I’ll offer you my honest opinion as someone that has developed websites since the late 1990s.
General Comments:
The front end of your site: That top menu isn’t mobile friendly. Your logo, there is no nice way to say it, looks unprofessional. Go to Fiverr.com and pick one of the higher rated logo gigs to get yourself a new professional logo created for $5. It is so cheap you should have a few of them made and use the one you like best. The low-rent pop under that shows fake windows updates, surveys and such isn’t something you find on a professional mainstream website. You should get rid of it.
Your overall design doesn't provide a means to monetize your content in the way modern websites do. Namely, through related content ads ( Such as Taboola, Outbrain, Rev Content and so on). These ads typically appear under the post and in the sidebar. This is where most of your income comes from running a website these days. You don’t have any of these and your site doesn't seem to be designed to take advantage of these types of ads.
Here is how it is done. Say you have an article listing the top 10 buffets in Vegas. The way you have your site-set-up now, that would be one page. The correct way to do it is to turn that one page view into ten. Using a design that incorporates, slideshows, and related content, you would have a picture of each buffet and paragraph describing what makes it great. That would get you ten page views instead of one using roughly the same amount of content. Experimental math: Say your Google ads and these related content ads make you $2 per-thousand page views, you have just made 10x the money doing it this way instead of how you do it now. Also, it improves your website metrics as you bounce rate is lower and your engagement goes up.
The Forum:
Our thinking was that many modern websites get their interaction through comments sections.
True, but not the way you are doing it. Most modern websites of any size embed Facebook comments or use another outside commenting system (like Discuss) to make it user-friendly. Relying on the native Word Press comment system will turn people off, and it will be a nightmare to manage simply because of all the bots that will submit spam comments. Facebook works great and it is easy to embed into Word Press. If you visitor is already logged into Facebook on their computer when they come to LVA, they will be ready to comment with no additional registration required. It also makes it more likely people will share your content on Facebook.
A new forum is almost impossible to start these days because it is difficult to attract users(You are competing with existing Social Media). It seems somewhat bizarre you want to throw yours away because you don’t like what people chose to talk about in it. The forum is an asset to the site in that it boosts metrics (engagement & bounce rate). As far as the crazies (myself included) go, your competition is FaceBook, Reddit, Twitter, Instagram and so on. Do you think people go to those places for mature intelligent discussion or drama/crazy talk? As someone else already put it, a forum is for entertainment.
The general tone of your comments seems to suggest you are trying to get new (younger blood) here. People in their 20s and 30s that are used to having freewheeling open-ended discussions talking about whatever pops into their heads on those social media platforms aren’t going to want to come here and participate in a very controlled conversation.
The problem with off topic discussion in the forums IMO is that there was never a place provided for it. Most forums of any size have one or more off-topic forums where people can talk about whatever they want.
The Word Press Forum you chose to implement seems to be a strange choice for a forum that already has members and is somewhat busy. I have never seen one used for anything other than a customer support board. It doesn't have robust features. It is kind of a stripped down bare bones sort of thing.
I think you are making it overly complicated as a robust forum is easy to set-up on a MySQL/PHP platform.(phpBB, simple machines, vbulletin and vanilla forums). Three of those are free and all have large user bases. The way you have this one set-up causes privacy issues. Even if the user changes their username, their profile URL still displays their email address. Bots will pick those email addresses up and spam them.
As far as moderation hassles go, If you set the forum up so there is someplace for everyone, the posts get sent to right places to start with and are only seen by people that want to see them. In other words, someone that wants to post about current events could be sent to a current events forum and that way the person looking for buffet advice wouldn’t be exposed to the “crazy talk.” Both users end up happy and you end up happy because you get the page views for both. I’d would also recruit volunteer mods from you long term users and allow them to police the forum. That would save you and your staff the time and the hassle.
If it were up to me:
I’d go to theme forest and pick out a WordPress magazine/news theme that was designed with related content in mind, is mobile compatible, and has built in features like slide-shows that would allow me to get more out of my existing content. I’d add a $5 logo from Fiverr and have something very polished and professional in a short amount of time for less than $100 total. Plus, I’d I have the designer to fall back on for support and bug fixing.
As to the forum, I would choose one of those I mentioned and not worry about integrating it with your membership database. Think of it as developing another mailing list.