For anyone else experiencing a similar problem, copying the tables over to a stock rom is the way to go. Stock roms for each ECU ID is available on the RomRaider forum.
Use the "Compare Roms" option in RomRaider to check which tables are different, copy all of the values over to the stock ROM and then save the rom. Use "Compare Roms" again to make sure you copied everything over correctly.
It might just be my imagination, but it seems like after adding LC, the car's low end response has improved, even when I'm just easing off from a stop.