1. Bahamut is an Airship, at least they're all refered to. There was no Summons in Final Fantasy I & II.

2. Biggs and Wedge weren't in Final Fantasy I through V and IX. In XII there are two soldiers named Gibbs and Deweg. Deweg is an anagram for Wedge, and for Biggs, they swaped 'B' with 'G'. They bicker like Biggs and Wedge from Final Fantasy VIII.

3. 'Ga', 'Aga', and 'Ja' have been around from Final Fantasy VIII - XI, and Raise was a term various old school Final Fantasies.

4. Cactuars started with Final Fantasy VI.

Final Fantasy is all about change (with various references to previous Final Fantasies), and I'm sure all those Final Fantasies mentioned above felt like Final Fantasy... The definition of Final Fantasy is different for everybody though. Final Fantasy needs change, if they continued to have the same material in every Final Fantasy, then it would be no better than Dragon Quest. Don't get me wrong though, I love Dragon Quest also. I'm glad they changed a few things up that they have been repeating a lot lately, it gives them something else to refer to in the future.