I'd say destro is really missing 1 extra aoe skill to be vaiable for stage 1 - lower power version of earthquake would be great as u suggested
However i dont see need to make eq/ww usable with 2h sword/blunts since you have shadow weapons anyway for stage 1 and lance is much less necessary later on as u get 4 extra targets with FS and will be able to enchant in up to extra 7 targets realistically in GF, but yes having to have 4 weapons (including bow) kinda sucks
Circular FS sounds too busted imo, its fine the way it is, just need more targets earlier
FS starting at +4 targets (or +4 at lvl 60) would really give alternative to farming ABG/frozen/shadows for destros but i dont think its happening
Overall, after all the testing I've done on OBT so far including spots/pve/pvp there is 0 reasons to play destro, last straw for me was sws and wl outdpsing destro in single target dps by like 30% in lab scenario
So for me, if nothing changes - I'm just skipping first 2 stages and from there make a decision if I want to play at all