The people complaining care. That's why they're complaining. People like Lucina and want to see her well represented. It's not about the proportion of unique characters within a franchise, it's about characters that are well designed and interesting on their own merits.
Actually this isn't the case. Quite a lot of resources have been recycled from Brawl for the sake of saving time and making development more efficient. Whilst Melee and Brawl reanimated every character from scratch, Smash 4 recycles quite a lot of Brawl animations. There are still a lot of fresh ones mind you, but only the newcomers are 100% original.
This is an incredibly obnoxious attitude. First of all "tourney fucks" really? If competitve Melee is anything to go by tournament players concern themselves more with whether or not a character is effective rather than whether or not they're a clone. There are A LOT of Falco players as well as good Ganon and Doc players in Melee despite all being clones.
Second, the fact that this is a fan service game is precisely why Lucina is a missed opportunity as a complete clone. If she was a clone in the same vain as, say, Luigi or Lucas then that would have bee amazing and fit really well. It's sensible acknowledgement of how she is as a character, whilst still offering her fresh, fairly unique gameplay. However she was, rather arbitrarily, made an almost exact replica of Marth. Doc is less of a clone than her and he is literally just Mario with a jacket.
Fan service doesn't just come from the character themselves but also how they are represented. Smash is capable of making typically dull characters really cool, but can also do the opposite as is the case here. I'm not saying this as a competitive player, I'm saying this as someone who likes FE and Lucina.
"Crippled" is a hasty exaggeration imo. Marth's fundamental design allows him to at least be decent due to his naturally strong spacing game. I'm not quite sure where people are getting the idea of Lucina being faster from. Her animations are frame by frame identical to Marth's and Sakurai did state that their physical abilities are identical.
Easier? Maybe in terms of actually getting the studio, but in terms of actual man hours it's definitely more difficult. Or at the very least more time consuming since render times need to be taken into account.
Yes. At least for Melee. Brawl, probably still yes but very very few.
Also at the Lucina clone vs alt argument:
If she was a clone they wouldn't share this animation because as I said before, even all the Melee clones had different idles from their originals (before you say anything Marth has this idle animation in Smash 4 too). It would be a different animation and even if it wasn't completely different it would at least be fixed such that Lucina is actually resting her hand on her chest like she should be as opposed to it being slightly above it. This is literally frame perfect to Marth's idle.
Ganondorf is the primary antagonist of the Zelda series. He's an extremely important character. As a character he has much higher standing within Nintendo than Doc, Young Link, Roy and Pichu in my opinion.
Landing lag in this game either seems really severe or non-existent (because a move can be easily auto cancelled), often it's not even on moves or instances where it makes that much sense. Why can Bowser auto cancel his fast BAir that deals 20% yet Sonic suffers a million years of landing lag on his slower, weaker BAir?
Every move Lucina did in that trailer was frame by frame identical to Marth's. Not similar, identical. Even her idle was identical (at the very least every single clone in Smash has had a different idle animation to their original. Roy for instance has a different idle to Marth. Only exception I think is Doc but he is the same character as Mario).
If she's her own character she contributes nothing in terms of gameplay. If she's an alternate costume why would they draw focus to the extent that they did. Either way I personally feel Lucina could have been represented a lot better.
Robin on the other hand looks wicked. Interesting concept of disposable Tomes since it's been a mechanic in the FE series for the longest time. He/she looks stylish and unique and I'm keen to see more of him/her.
And Falcon...well Falcon needs no words.
Disappointed Shulk wasn't revealed today though I'm confident he'll get his time. He's still my most anticipated character.