I think EVE online pulls the missing components on a saved loadout from other ships and gives a warning about it. Don't quote me on that, though.
I only have three mechs (9 variants) and it's already a mess.
Even if it doesn't get the missing components from other mechs, it would be useful, if nothing else, to remember exactly what build you were using on that mech. When you're eliting and trying different builds as a new player with no money you're not just pulling engines, but weapons, dhs, baps, tags.... so you then have to remember what mech used what component. I already have Li Song's mechlab but it should be a feature ingame. At least they should let us save the loadout, even if then you have to go and strip the components yourself from different mechs (it could even inform you if you have that component in the inventory or in other mech)
Edited by Dibujor, 11 April 2016 - 02:59 PM.