I prefer the current perk system.
I definitely prefer the fortitude and agility aspect as opposed to the wellness system.
I dislike level gates, I think they should all be completely removed to allow the maximized creative freedom of leveling players.
(even intellect crafting-based ones which were implemented in the update today; If people want blade traps by day 10, let 'em have 'em. That's what a specialization is, there shouldn't be limits on a player's creative freedom.)
I think we should let players achieve all perks by the end. The thing is, if you specialize in one or two attributes, you'll miss out on the other attributes for a large portion of your world exploration. Even if you can eventually unlock everything, you'll spend a lot of the game missing out on many things. Invest heavily into intellect and fortitude, you miss out on the juicy benefits of strength and agility, etc. Allow creative freedom, that's what I say, I love creative freedom and choice. Choosing the ability to farm more effectively and regenerate health passively, over increased carry capacity and head-blow damage, is a HUGE sacrifice, but that's what I like about it. You can be better at some things and worse at others. If you invest only in intellect until level 25 and become able to make steel tools and blade traps, then you'll only begin to scratch the surface on agility, strength, fortitude, etc. That's a lot funner to me