I think you'll find that it gets quite a bit lighter when you get rid of the expansion chamber.
The level 10 won't help with the rate of fire. Its no different than the level 7 in that respect. It will help prevent chops when you get heavy on the trigger, especially when you run low on paint in your hopper. If you do get the level 10, you will want to sand the outer edge at the front of the bolt down. The micro mag breach areas are a bit tighter than a normal ULE mag body or most barrel inside diameters for stainless mag bodies. The level 10 is a nice addition to a mag though. If you take the time to set it up properly, it is easy to do and won't give you any issues. I've shot many dozens of cases of paint through my mags and never had a level 10 issue other than normal wear and tear that would require an oring or bolt spring change due to it wearing out.
The benchmark frames are known to have quite a bit of play in the trigger. You can make it more crisp by adding a shim or two on the trigger pin between the side of the trigger and the body.
Except for the Automag in front, its usually the man behind the equipment that counts.