Clan XL engines are seen as too powerful. Even in the "worst" clan mech, they are much better than IS mechs without quirks.
Do recall that PGI is trying to reduce/remove many of the quirks that have brought some IS mechs up to clan fighting capabilities. Also do recall that when PGI tries to nerf "those mechs" that are deemed really good, everyone (not literally) complains about the nerf on "the mech I paid money for" (usually), they spout how useless that mech is, and yet continue to play that mech and remain rather powerful. Then, due to complaints, PGI sometimes reverts the changes because "the forums are on fire".
As far as changing some base technology mechanics, it's Battletech. It's how it's always been. Not just in this game. It wouldn't be a "Battletech/Mechwarrior" game without some of those mechanics being as they are. IS XL engines are one such point.
I personally am of the opinion of "Try it out first, then give more detailed feedback". It's okay to come out with a preliminary concept of the proposed change, but often times it's very worth at least giving it a try. It's only 20% of your speed, compared to your mech's destruction. You're losing about 20% of your mech's engine, so it isn't too far out of the realm of believe-ability to have speed reduced by it's damage.
PS: Proposing unlocking clan Omni-mech engine restrictions isn't a buff to just the under preforming mechs. It's a buff to ALL clan mechs. Which, as I mentioned, 3 out of 4 weight classes already have clan mechs strongly as the best mech in the game status.
Or, as someone else mentioned:
Tarl Cabot, on 24 November 2015 - 07:50 PM, said:
One question to be asked: if a locked component could be selected to be unlocked/removable, what would it be and on which omni, other than the engine and FF/Endo? Why would it benefit that mech?
Another question for the items that would not be unlocked such as FF/Endo how would distribute between the ST and arms for specific mechs and how would it benefit that mech?
AKA: Make a more reasonable proposition.
Example: The Must Lynx is hindered and not a good preforming light mech. I suggest unlocking the CAP from it's head slot, so that the extra ton of weight can be better utilized. It's ECM/AMS arm could also possibly use 1 energy hardpoint, to make it more practical to take that omnipod.
Example of the opposite: We should have all equipment on clan mechs unlocked! The Mist Lynx really could use it's CAP unlocked! (Which provides counter argument of "then mechs such as the Timberwolf would become more powerful", which then spins off into "but the Nova could use to have some of it's DHS unlocked so it could better utilize the ballistic hard points it has." Which then spins to "We probably shouldn't due to lore and/or balance. Some components are locked for a reason, such as the JJs on the Timberwolf S becoming locked for balance within the game." Etc.)
Remain specific to a chassis. State what you feel is wrong with it. Mention why (in this case for clan) certain component(s) should become unlocked, how it would specifically be intended to help the chassis, and consider any possible considerations/points of how it might even unbalance the chassis in the game (aka: making it too powerful/weak).
I can't agree with clan engines becoming unlocked across all chassis because a possible speed nerf is coming when they become damaged and lose a side torso. That will end up being too much of a buff, and will only increase the power of all clan mechs. It doesn't restore a sense of balance between other chassis, making more mechs viable (on a general scale). Instead, it would just place already powerful and "best in game" clan chassis into an even more powerful position. (Example: Being able to reduce the engine size on the Timberwolf would permit it to equip even more weapons possibly, making it go from best in it's weight class, to so far ahead that no one can catch up to it. Sure, it could also help the Summoner, but not as much as it would the Timberwolf or Ebon Jaguar.)
Also, as a side note, depending upon what sizes are being able to be exchanged, suddenly your proposal would force clan omni-mechs to also unlock all heat sinks, as if you drop in engine size (your proposal with the Timberwolf being the example), you suddenly can't contain the proper number of heat sinks within your engine. (Which may, or may not, throw balance even farther out of order. Some mechs have locked heat sinks to maintain balance. If a specific chassis could benefit from unlocking a few heatsinks, it should be on an individual omni-pod/chassis scale, and considered to help balance a mech to increase diversity among all mechs. Much like individual quirks.)