i would propose something like, from the OLD values:
reduce timer by 20% ( so that short timer's don't get even more ahead of the rest)
decrease AP per regen by 50%
this ends up with fairly similar values. i won't go into too many lands because spoilers, but for an eg, no homeland:
this would have the same result as above, making AP more valuable, but allows other stats to regen faster. when i was a newer palyer my main problem wasn't AP, it was vitality to keep fighting, and having a faster time means more VE, which actually makes AP spent on healing creatures more valuable as you are much more likely to have VE when it comes to healing something.
this also has the added benefit that periods of activiity can be closer together. i also think you could go much further with this and maybe even reduce the timer's by half and further reduce the AP per tick, but that would be an extreme
edit: here as an example of the extreme case. have not checked this for all lands however. ap per regen reduced to 33%
edit again: actually checked al lthe extreme examples. most of them bar a few outliers are actually *closer* to the current values than the original idea.
if anyone wants the full table that i drew up, send me a pm and i will consider sending it depending on who's asking