Well, hello. I'm new to Supermechs in general. And to forums in general.
I want a fishy stick.

Otherwise, onto my suggestions.

1) Level balancing

Why? - So, I started my first account, and beat the tutorial up to the point of the first box saying "You need to win two multiplayer matches to unlock this box." I went to the multiplayer area and confirmed i was 13 and older. My first opponent was a mech with 500 hp with quite a bit of mythicals and other swell things. I got oneshotted. I queued again and it was the same. dude.

Really?

I eventually got my two wins, but it was very annoying. Perhaps an option while you're in the softer ranks (maybe 18-20) to have a match made by your account level?

2) A way to disable being in a chatroom.

Why? - We've all seen the cancer that (can) go on in the chatrooms. Some guy is a self-proclaimed god and is taunting people to fight him blah blah. It gets annoying. Dont forget dem spammers doe. I can see blocking everyone, but people will eventually join the chat again.

3) An option to sell weapons, and not just to upgrade.

Why? - From what I've seen so far, there isn't a way to sell weapons. You can upgrade them, or use them as chow-time for the things you need. However even using them as upgrade materials, the upgrade seems minimal (to me).

(sends "fishy stick")

Anyway, umm yea expect to lose a lot until you're rank 1.

Chat rooms, ehhh. If there is someone annoying me, they get blocked. If I ever see them again, they get blocked regardless.

Selling, this was in the game at once point (I want to say until early 2014). They took it out though as it was possible to sell and sell and sell to farm infinite (or too many) normal item boxes.

Welcome to the forums!