Feel free to comment and such, but this is just what I've come up with since i started playing the first night beta went live.
1. Jumpjets. On the light to medium mechs, they seem a bit lacking. Yes, combined with MASC and a full speed run, you can cover a moderate distance, however, having to rely on a two other conditions to make the jump lengths acceptable, not to mention the fact that jumping is actually slower in most scenario's than just running with MASC. I'd suggest making the jump speed faster, but keep the same jet duration. The recent change to the amount of juice needed to lift is a start, but they're still just a little bit behind.
2. Weapon velocities. Just a minor gripe, would love to see a slight increase to AC/Gauss projectile velocities, and a significant boost to PPC velocity, it's pretty difficult to get a good bead on targets at max range with a PPC, they're supposed to be a particle beam, ergo traveling at (nearly, but close enough for art) relatavistic speeds, like lasers.
3. Improve the BA flamer. In it's current state it's nearly impossible to kill another elemental with (in any realistic situation, of course you can VERY easily kill yourself with it), and will often overheat before distressing even a hot vehicle/mech.
4. Would dearly love to see a variety of BA suits available, but that would require art assets, new animations etc etc, just a pipe dream.
5. Increase ammo count for M-guns, and slightly increase damage against hardened targets. They're not just an anti infantry weapon, they are also a backup weapon for when heat or other variables makes other weapons unusable. Currently they don't even scratch the paint of anything beyond 20-30 tons.
6. Increase ammo count for RAC-2, they burn through their 600 rounds at a prodigious rate. Also possibly a slight increase for the RAC-5 as well.
7. Increase turn speed for hawkmoth. As it is the sluggish performance of the hawkmoth makes low altitude work more a danger to yourself, than an asset. As a trade off decrease the top end speed a bit. Vtol's are supposed to be VERY nimble, that was their main strength in tabletop. Vectoring your thrust forward should put -all- the thrust forward, as it is it shoots you up at a 45 degree angle it seems This would help with staying low and fast behind ground cover as well. Also an increase in their ability to lose altitude would be great.
I'll toss up more I'm sure, but for now, I need a beer.