As a single-income family of five, we just don't have it in our disposable income to purchase PSLs and season tickets so maybe my opinion doesn't matter... However, I do try to make it to a few games a year and was able to make it to the Hags game. Putting my disgust of what happened on the field aside, I was somewhat disheartened (I won't say shocked) at how degraded the stadium experience was this year.
1. There's no ryhme or reason on the parking. We had Blue Lot parking passes, and even though we got there early and there was ample parking all over that area, we were instructed to park over at the loading dock of the Reliant Area (or whatever building that is on SE side if the blue lot). We asked why and the parking attendant said "The guy up on the roof instructed me to route 4 cars over there". Say wha...??? In addition, there were people parked in section that they apparently blocked off again for some reason. We were really looking forward to the tailgating experience, but were totaly detached from it. We still had a good time, but were disappointed we weren't in the main tailgate area. We wanted to mingle with some Texans "neighbors". Maybe there was some reasoning for what they were doing, but we couldn't figure it out and I don't recall them doing it this way in years past.
2. Coming into the main stadium gate, they had lines for Men/Women/Family where they check for weapons. Cool, post-9/11 times, I'm good with that. However, the mens line was MUCH longer than the womens line, and when we finally get through the gate and reach the checkpoint, they have 1 male security guard checking the men and 2 female security guards checking the women!?? Isn't this sort of backwards??? Needless to say, the womens line was flowing quite nicely (empty most of time) and the 2 female security guards were having an easy day at work, while the mens line was moving rather slow and the male security guard was busting his ass. And no, they would not allow the women guards to check the men.
3. The consession quality has gone down, IMO. I had to walk about 10 sections over just to find some soft pretzels. Not a big deal, but jezzus, each concession stand has like ~4 soft pretzels machines in them. If this is (apparently) such a hot sale item, can't someone order enough supplies to keep a few of them filled up?? In addition, only 1 time during the game did someone come down our section (Section 122) selling beer. 3 times they came down selling cotton candy.

I don't mind walking, but I'm there for the game and would like to have the option to buy a beer or soda from time to time without missing game action or disturbing other fans (by getting up and walking down the row).
4. I agree with Chuck. Found lots of advertising but finding other game scores was a chore. And when I did find it, they offered no real-time game/player stats that I could see.
5. The restrooms seem to be less maintained than I recall from years past. I guess they've reduced housekeeping staff so they could maintain the quality of play on the field. The only problem is the game play is about at sh%tty as the restrooms (rimshot).
6. It's 2009... They should recognize the stadium has some sort of cellular interference going on and offer wireless access. For-pay or free, it should be available if you want it.
Most of these issues are annoyances rather than big problems and we still had fun being together and enjoying a Sunday game. But if I noticed these things and a reduction in the quality of service, I'm sure a season ticket holder would notice them and be a little more perturbed since they have more invested.