Well Lucas is not 100% unique; I think it's clear that he still takes less work than, for example, Porky would. That wasn't really the question, though.
I guess the question is more if you think Porky (or potentially another Mother character) would rep the series better than Lucas (or I guess Ness if that is your opinion), taking any differences in resource consumption out of the equation.
I'm not really saying it should happen; it's just sort of a hypothetical question. Yes, I agree that Mother has plenty in Smash already, if not more than enough, and I'm not really asking for more.
And since you bring it up, yeah, I would also like to hear people's thoughts on how they'd envision the Ness and/or Lucas movesets if they only used their own PSI moves and weren't amalgamations.
I also love the Thunder mechanic and am not sure what they'd use without it. And, yes, Rockin and Love for the FS.