The recent update nerfed the FEL-IX into trash tier. And it doesn't look like it's going to get buffed anytime soon (considering how slow balance changes come).
Vassili is a slow merc and supposed to play slow. Aimee is a fast merc that you are supposed to move a lot with. But now, the Grandeur got nerfed again and FEL-IX now fires so slow that you can't play it aggressively anymore, it leaves Aimee with no benefit over Vassili. She is still faster, but her speed is useless with the Chinese FEL-IX and the bad Grandeur.
She has no machine pistols to back her up after missing the first shot and I don't think she needs them either, her gadget is a lot easier to counter than Vassili's, she is squishy so you will die a lot if you push with her now and don't hit the first shot. Before the nerf she was able to fire 2 shots before it being a confirmed death, or fire 1 shot, fall back behind a corner, reload and then fire another before being destroyed, now it's no longer possible because you will die before you reload.
That leaves us with 2 solutions:
1. Buff FEL-IX, make it useful again
2. Give Aimee a MoA so Vassili doesn't overshadow her completely.
The MoA does 138 damage with a headshot which is enough, and if you combine it with SNITCH debuff you can deal 172 damage just like the FEL-IX. And it still fires fast enough to be played aggressively and go for a second shot after killing an enemy before they get revived. Only problem is that Vassili is too slow for it and it's a lot easier to do with Aimee. Also most Vassilis will just pull out their pistol if they miss the first shot
Edit: if she does end up getting a MoA in the end, it should replace the FEL-IX while keeping the same augments and secondary/melee in gen 3 (F82 will turn into MO82, F51 will be MO51 and etc.). And please give us the option to convert our gen 2 into gen 3 so I don't lose my cobalt F82 : 3