I feel the opposite.
Tried Aria lunch buffet a couple years ago & thought, it was fine. Did breakfast this time & was very impressed. Great ambiance with windows out to pool.
Tried Bellagio breakfast buffet a couple years ago & thought the selection was high quality. Then last year, I thought, yeah, food is pretty good but ambiance SUCKS--dark, very cafeteria-like.
I usually stick with breakfast as that is pretty tough to screw up (tho PH sure did) so I am almost always pleased; plus a bit cheaper. We usually come in about 10:45 so we can take advantage of lunch fare coming out as well.