NO, NO, NO!!!!!!!!!!!!!
Clan XL are fine as they are. And don't respond with lore doesn't make a good online game nonsense either.
Per lore, Clan XL engines only suffered speed and heat penalties if one torso segment of the engine was damaged. This is because there are only 2 crits of clan XL engine in a torso vs 3 crits of IS XL engine.
As far as "good game play", there is also a reason to leave them as is. With Clan Omni mechs, there is no ability to choose engine size, they are hardwired into the chassis. In lore, any attempt to changed that would either cripple the mechs capabilities, or render it an battlemech and no longer an omni, In fact, all aspects of an omni mechs , other than the omni pods are totally fixed items that cannot be varied, endo, ferro, etc.
IS mechs all of the above are customizable. XL engine is a choice, endo, ferro, are choices you can make, which actually makes IS mechs far superior in their ability to be "customized. THiS is the advantage of IS mechs, the disadvantage is IS mechs XLs do explode if a torso segment is taken out.
Clan XL does not, but Clan Omnis engines are not a choice, nor the other structural components, you are stuck with what comes stock, whether you want it or not. The only ability to customize a Clan Omni is in what pods you utilize.
Clan XLs in Omni mechs should, and must, retain this ability.
I utilize IS XLs all the time, and honestly, it's rarely an issue, and only if I run into a ballistics dakka line. In fact, I lose more torsos in Clan mechs than I ever do with an IS XL'd mech.
Both factions need to have unique advantages and disadvantages, for Clan, it's sturdier XLs but lack of structure/engine configuration, with IS, it's less robust XLs, but the ability to customize all engine/structural aspects.
Edited by Lupus Aurelius, 11 December 2016 - 04:18 PM.