Yeah I guess Marjia clearly wanted some people to lose.. and ended up banning me and my brother for no reason. Anyways, now that you have a second chance, good luck!
I've heard about a performance update. It will come with high fps support and overall code improvements. I'm sure small balance patches will come with it.
If I were to change something, I would increase the fortune box loot to 3 cards instead of 2. As for campaign grinding, make fortune boxes appear on insane difficulties that way people can farm on insane freely.
That way the box is still rare, is still a gamble box, meaning rewards depend on chance but those legendary rolls yield more.
These events could be cool and encourage unique builds rather than sticking to your main meta mechs. I think for this to work you need to tie it to specific game-modes(NOT globally) and make the percentages higher to have a meaningful bonus for switching up the builds.