No Support.
1. Feels like an unreasonable level of P2W. Players who wish to compete on the ;;hs or KOTS would be put at a serious disadvantage by some of your suggestions.
2. Suggestions such as the rejuvenation pool have been declined due to the effects it would have on pking. I dont see why the same suggestion would be declined when put behind a paywall if the effects are still the same.
3. I agree with the premise but not the execution. Most of the current perks appear to effect drop rates, Gp/H or additional limited features (skin colour for example). I think that the current system is a better model than targetting Xp/H which is what would be affected by your current suggestion.