I see the EDs as a mixture between enhancements and epic class lvls. The thing that bugs me atm is, EDs go up to lvl 26, lvl will go up 28/30.
Therefore we lack like 2/4 lvls of APs.
how about each epic lvl grants 2 general APs. Those can be
a) spend in enhancement tree
b) spend in ED tree
c) converted into twist points at a rate of 4:1
This leaves lots of options to customise your build.