I've seen this argument a lot - and people are always really hostile on both sides.
So let's see how far we can go with this
Think about your most wanted character, and think about the character from Smash which is closest to them mechanically. Would you rather...
- Your favorite gets in as Smash Ultimate DLC as an echo. While it may seem contrived, the animations work well enough, but there's so much missed potential (think Dark Samus or Peach). Also, you never know if your character could get Ganondorf'd and never get a proper kit.
- Your character is omitted wholesale from Smash Ultimate, allowing them to get a fully appropriate moveset in a later Smash. Whenever that happens. If they're selected in the first place... So, pretty much there's no guarantee you'll ever get them in Smash.
Honestly, I'd take the echo if I could guarantee my characters getting in. Ganondorf felt great in Brawl, and now he feels beyond incredible, so I'm not too fussed that he's missing a lot (honestly, I'm way more disappointed about losing the TP looks). I've never been fully against clones...as long as I like the character (either the parent or the child). The only clones that annoyed me were Sm4sh's, which were three clones from three movesets I disliked and characters I was indifferent to at best. But Daisy/Peach? Excellent choice.
I'm all for more echoes. Tails over Sonic chief among them. Heck, if comeone gave me Dovahkiin over Robin or Link, I'd be really confused, but I'd be 100% okay with it as soon as I saw Kirby with the hat.