I would be in favor of a reduced release schedule of new content if it enabled the revisiting/refreshing of older content. But I also understand that new content is what sustains the game economically, so I wouldn't want The Sims team to stop making new content altogether. Perhaps they could have fewer Expansion Packs and more Stuff Packs / Kits while revisiting the older packs and improving them. It would particularly make sense to focus on the packs that have had less positive reputations / more issues (Dine Out, etc.) to try and get people who've held off on buying them to feel confident enough to add them to their game.