Tbh i dont give a **** about rampage and ID, if i want to use these aility i would log my slayer instead of my choppa.
i would like to make the choppa shine with what it have, not with what it have to steal from slayer.
this is the idea

step 1:
swap Yer Getin Soft and Pent Up rage. the point is that Pent Up Rage is powerful but it require a too huge investement and thus isn't viable in DW build.
@Grunbag you can't move Pent Up Rage in 3rd tree! this would **** up 2H build. his place is in the first tree, where everyone can take it.
As it is now Yer Gettin Soft is useless because let you crit with useless ST ability, moving it in mid tree and increasing his duration by 1s will make it powerful (since the strongest ST choppa ability are in mid tree) but obtainable only by 2H choppa. so this will not make choppa OP in wb with endless +15% crit (at least one target will parry/block your aoe granting +15% crit forever, too powerful) but make 2H build more viable.
step 2:
2H choppa have less survivability compared to DW because all his 2H ability are short ranged (while aoe can reach 40ft), lose 10% parry and dont have pull (to close the distance) thus having Longer and Stronger in mid tree (with tick-time reducet to 2s or 3s and heal a bit buffed) will grant him more survivability.
Long lasta now is useless because with 2H you you are not AP starving and if you are good you will not hit enemy from front and thus Long Lasta will never proc. moving Long Lasta in AoE tree will make it more useful since hitting up to 9 target your proc chance are increased and when you use aoe you spend a lot of AP (wild choppin cost 55 AP).
Consequeces:
1) 2H build will have a usefull 100% crit tactic that cant be taken by aoe choppa. this will make 2H build more unique and strong (now is a bit lackluster)
2) Pent Up Rage will be attainable by all choppa since first tree is mendatory for every build(moving Pent Up Rage to 3rd tree will decrease significantly 2H choppa burst)
3) if aoe choppa can have both Pent Up Rage and Chop Fasta then he can use Wild Choppin' up to three time consecutively! This will increase choppa aoe damge by a lot! Slayer can't do this since they dont have Chopa Fasta. this change will close a little the gap between Slayer aoe damage and choppa aoe damage.
this 2 change will make 4 useless tactic became 4 usefull tactic and will close a little the damage gap between slayer and choppa. this 2 change are not enpugh, that's need to be said, but surely are a starting point.
Edit: the subsequent change can be to apply a damage component to Chop Fasta and try to make Keep On Choppin' useful. The last step will be to talk seriuosly about GTDC.