I suppose that the XL-Engine isn't really for front-line build? Although my other mechs are Clan, which have XL-engines but would survive one-torso destroyed, whereas IS wouldn't. Simply they are too vulnerable when equipped with XL-Engine. In larger mechs, like assaults, they have large hitboxes compared to smaller mechs, making them the least advisable mechs to be equipped with XL engines.
But does anybody even use STD-360 engines? Those weigh so much.
I think it would be fair that it would take 4 destroyed critical engine slots than 3 to down a mech. That way it would be the same for the Clan by destroying both torso, just as the IS, without altering the size of the XL critical slots on the torso.
UPDATE: August 27, 2016
As suggested by several members, LFE or Light-Fusion Engines could be another way to solve this. Another type of engine that has the same amount of critical slots as the Clan XL -- which is two on each side torso than three. But middle ground in terms of weight between Standard and XL.
Another take in this, since King Crab has an overwhelming disadvantage; aggravated by immense hit-box and slow movement speed, I propose to increase the tonnage of the King Crab and maximum armor point, perhaps an additional 5, 10, 15, or 20 tons of extra armor; 160, 320, 480, 640 points of armor.
That way, people have many options, that they can invest with better armor, better engine, or better firepower.
Edited by The6thMessenger, 26 August 2016 - 11:43 PM.