Choppa is like blackguard and witch elf, one of the in my opinion fringe warband classes that needs a bit of love to make it more viable... choppa feels very gear / rr dependant compared to some other classes... other classes tend to do its role better and its one good synergy with sorc got neutered.
for every good choppa i've seen many bad and not last... so good luck if choppa is your main
As for Aki... I am pretty sure he knows what he is talking about being one of the top killers in zone with choppa in our TUP WB (when we use to run them more) and compete with Sorc's... but Choppa does need some less fluff choices and better synergy within its own tree's