1. Prince of persia vs Assasins Creed?
Isnt thats like competing with itsself? Assasins creed is a Price of Persia Spinoff.
2. I loved Altair and hated Ezio. you are ocmpletely wrong.
3. Naval battles were not pretty fantastic. they were pretty much the worst part.
4. Saying Prince of Persia improved is saying it was ever good.....
5. Time travel was quite terrible invention and kinda messed up the franchise.
Now if you want a franchise that really improved would be, say, Europa Universalis, Elder Scrolls, Grand Theft Auto (if we forget 4 exists), Homeworld, Hitman (if we ignore the lastest one, see the pattern here?)