I wouldn't like to see any games retired at all, and in fact would prefer to see 7-8 retired games reinvented and brought back in addition. Certainly, there are some games I'm not overly fond of, but I still don't mind seeing those games as part of a large rotation.
I also believe every single game serves a purpose on the show, and the ones that have problems (i.e. all the retired games, plus current games that are too long, too hard etc) could all be fixed if the show's staff really wanted to fix them. For example, the issue with Magic # having too wide a gap between the prices can be resolved by using the same solution Clock Game adopted years ago by offering two sub-$1000 prizes, then a larger 'bonus' prize. The staging can be resolved by literally having a screen with the magic number between the two prizes (like Do The Math), so that it's more intuitive that the number needs to be between the two prizes. To The Penny has an issue with its rules and money tree but that could be solved pretty quickly if they wanted to. Hot Seat could be shortened by revealing the first two correct prices at the same time (given that a contestant has only ever once got less than two prices correct, and no one has ever bailed after the first price was revealed), and only starting the bail out decisions from the 3rd item onwards (i.e. only offer 2500/5000/10000/20000).
The only reason I could understand for game retirements is storage space, but even then the show could consolidate some of the game props if really needed. As a last resort, some games could share a monitor and just have different 'cover plates' that are quick and easy to clip on and off - similar to the early shows where several games shared Any Number's prop, just with different covers - to still make the games look distinct. I'm thinking games like Take Two, Double Cross, the Rat Race monitor, Bonus Game, Pathfinder price display, even others like Money Game etc. It also brings to mind Roger's comments on the storage space and that he'd much rather get rid of background set pieces before getting rid of games for storage reasons given they are the core of the show.
I can appreciate Chelsea's argument for a wholesale cull of the games for a leaner rotation. Coming from Australian TPIR where we had far fewer games at any one time, I love the extra variety of games in the American series. It makes for an interesting exercise though and I could probably cull 15-20 games pretty easily as it's something I've often thought about with Australian TPIR - that is, what would be the best choice of 30 games for a half hour show (or 60 for full hour) if you were starting fresh, ensuring all the bases are still covered (fee games, car games, some quick games etc). Some of the early classic games - Grocery Game, Range Game, Hi Lo, Clock Game, Temptation, Bonus Game - wouldn't make my list due to their rules and/or similarity to other, better games.