The title says it all. Should the Tactics universe have been included in Dissidia: Final Fantasy?

Whether you want to specify between Tactics and Tactics Advance is up to you; I'll leave this broad.

Personally, I think they should have. Wouldn't it have been awesome to use Ramza and/or Delita? Or Marshe or Luso? Whether they could've included them as a one-off, as per Gabranth and Shantoto is up for debate, but it also raises further questions. Should they, for instance, have included characters from that strange side dish of Final Fantasy Crystal Chronicles?

Ahh, so many questions!

Thoughts?