... Not really.
People here are just asking about adding more, not taking out the existing alts.
I’ve seen a few posts here on this thread implicitly and explicitly saying they want to remove existing alts and replace them with female ones.
This implies he wants to remove DQ8 and DQ11 Heroes and replace them with DQ9 and DQ10 Heroes because they have female versions.
My problem with DQ9 Hero/Heroine is that they are Celestrians. They have wings like Pit and the other Heroes/Heroines don't. So... why would only two alts have wings and the rest don't? If they have wings, they would have to be able to fly like Pit and that wouldn't fit the other Heroes/Heroines.
Okay, but Anlucia isn't even the DQ10 Heroine. This is the DQ10 Heroine. This is also the default DQ10 Hero and yet the DQ10 Hero doesn't look like that in Smash. Instead, he is based on the promotional materials and box art for DQ10.
I suspect they did not pick them because they are from a Japan-only DQ game so they would be obscure outside Japan... and it makes more sense to pick someone who is more popular/iconic/familiar and is actually international like DQ4 Hero and DQ8 Hero. That, and DQ10 was one of the worst selling DQ games.
As to why Sakurai did not include the DQ4 Heroine, I don't really know. Maybe the DQ4 Hero is more popular/iconic/familiar since he, along with the other male DQ Heroes, are always grouped together like Disney Princesses in Dragon Quest promotional materials. It's also probably why they didn't go with the default DQ10 Hero and instead went with the one from the promotional materials and box art for the Final Smash. DQ Heroes are simply more recognizable than DQ Heroines.