I actually don't think TES should have any kind of level cap.
If I recall correctly, Skyrim won't have a level cap. It will just get MUCH MORE DIFFICULT to level up past a certain level (which I think is 50, if someone can correct me here). So it seems like Bethesda actually listened in to a fairly silly, yet effective, idea proposed for New Vegas and leveling up past 30. 1-30 is your standard progression rate, anything higher requires very high amounts of XP and it just gets higher per level.
As for perks, I really hope Bethesda actually puts effort into making them this time. The last thing I want are really OP'd perks (kill a guy with a spell, get ALL of your magicka back) or really useless perks (your sword now does an extra 1 damage).
If the perks are ridiculous at launch, then I'll wait till some mods come out to not make them so ridiculous. Or remove them completely.