Alrighty Drerek, I got the mech you sent me, and there is only one potential problem with it. You didn't increase the mechs walking speed, so it only moves 1 hex per round.
My suggestion would be to drop the Ultra AC 10, switch the engine to Fusion XL, change structure to Endosteel and crank your speed to 6 walking (the norm for mechs of your size) and add 2 heat sinks.
Another way to go, if you're a fan of the Autocannon would be to drop the PPC and the Sreak SRM 6, and switch Engine to Fusion XL and structure to Endosteel, then increase movement to 6.
If you don't care that much about speed, your other option would be to increase the tonnage.