Hi Justin
Sorry to be so snippy earlier, I am up against a wall of my own right now, I apologise.

So we have eliminated excessive draw caused by the gyro. Now we need to eliminate the gyro weight.
Too bad you changed something else in the meantime, if we go about this in an orderly way we can track down the exact cause and perhaps help others (like me!) avoid the same thing.

So I would suggest putting the pitch back where it was and physically removing the gyro to see if the weight difference is causing the lack of performance. But as I said earlier, I doubt if the weight will matter that much.

Normally having the motors swapped around doesn't hurt anything. I think the board actually uses the same dual mosfet type for both output circuits.

As long as you didn't stall the tail motor while it was plugged into the main esc, it is probably OK.