Chrom was the odd one out to me(at first). Had nothing to do with Roy beyond being part of FE. But then it hit me; Roy is basically something of a cross between Ike and Marth overall. Chrom was noted as "being too similar to Marth and Ike". It could just be a meta joke. A lot did expect him on Ike, but it didn't much matter because we still got a variation of Aether, making Chrom a well-thought out and fun Echo.
That said, I do wish Daisy had a few more differences. I already found out(some time back) the damage on her Vegetables can be different from Peach's, which is a typical change we've seen(where it barely affects gameplay). So at least that's nice. Now if only Dark Pit and Daisy do just a bit more. A different weapon among their moves. A few differences in their hitboxes for certain attacks, etc(Daisy having slightly different hurtboxes doesn't mean much. It's not really a tangible or noticeable thing much of the time, whereas Chrom and Lucina not having a sweetspot is a bit more useful in battle, and it seems like they're currently doing better than their counterparts among competitive play due to that. Even if it doesn't stay the case, the lack of the mechanic does appear to have a reasonable effect on the metagame. I hope more Echoes continue to have that much going for them).