More if it did what? If you're avoiding the Yubikey's onboard ECDSA because you're worried ECDSA is weaker than EdDSA that's definitely crazy. The main thing the Yubikey is doing for you is protecting that private key from just straight up getting stolen, whereupon it could be some future quantum-proof magic and you're still screwed because now the adversary has it.
The OpenSSH FIDO implementation offers ECDSA because it makes sense to use ECDSA on older authenticators that don't offer anything better rather than go without. If there were any stand alone authenticators (as opposed to hybrid software like Microsoft Hello) that only offered RSA then I suspect OpenSSH would sigh and allow that too. For all that Safer Curves makes out it's the end of the world, bad guys really do steal SSH private key files and they don't actually perform crazy timing attacks on ECDSA because it's very hard.