I can. Simply because both characters are female, and they wouldn't be *another* Goku, Vegeta, Gohan or Buu.
The thing about Cauliflower and Kale is that they're both a) too new and b) the saga they're introduced in hasn't even really gotten fully under way, yet. At most, as far as Super content goes, I don't see them going past Goku Black for Base Roster.
That said, I think it's more realistic to expect multiple Gokus, Vegetas, Gohans and Buus in this roster.