The WK barrel measured .75" in front of the chamber shank out to just before the gas port journal, then flared out to form a shoulder for the gas block. Gas block was standard .75", then tapered again to .65" to just short of the muzzle. I fear they cut too much out from the chamber to the gas block, and that was a carbine length gas system. Quite light, and yes, the rifle was nose heavy. I don't think there really is much to be able to mitigate that other than balancing the overall weight of the rifle out.
Perhaps Mark IV (two years out let's say) can use Stoner style pseudo piston impinging against the 180 system from a gas tube?
In the meantime, strengthen the barrel enough to get it working properly through thickening or fluting to the amount needed. Best wishes to the producers on finding what is required!