Considering everything Capcom has told us, you didn't have variety in the first place. The only good other choice which could've been allowed was BB Hood. They could've used Bishamon like you said, but then nobody would care. Morrigan is the staple (main) character of the series especially when it comes to representation. Felicia is just as popular since she represents the less important characters; ones that aren't directly involved with Makai anyway.
While I'm happy with Morrigan and Felicia in the game (and thus not "sick" of them), I do agree with there needing to be more exposure for the other characters. I'd love Sasquatch to be in, and I'm rooting for Talbain for dlc, as he has the best chance. Pretty happy with Hsien-ko, too. But yeah, I guess it comes down to needing DS4.