I agree about the negatives of staying downtown in general, but it seems like Susan really wants to be able to play Bonus Poker, and downtown offers several choices as well as LVA coupons.
The problem with Aliante is its isolation. You want to go somewhere else, it's a considerable drive. Either the Cal or the Gold Coast would enable you to visit other casinos on foot. I for one hate having to fetch the car every time I want to visit another casino.
Susan wants Boyd because she has a relationship with them and offers to use, but no new customer should stay or play there; its earn-no-points bottom tier (Ruby) is simply a slap in the face. And you don't climb out of that tier very easily. And when you do, if fifteen minutes goes by without you giving them any action, they slam you back to Ruby.
Aliante is nice because Stations originally built it, as part of their program to appeal to the outskirts McMansion crowd. Its vibe is like Red Rock or Durango for that reason. It's definitely a better atmosphere than places like the Cal or GC, which often feel decidedly downscale.