>>47479823>>linear E4 battlesThis is straight up wrong. Gen V let you challenge the Elite 4 in whatever order you wanted.
>>one or two rivalsGen V pretty much started the multiple rivals trend, and because of the friendlier relationship with N he could easily be considered a rival. I say pretty much because Wally isn't a proper rival in Gen III because you only battle him twice, and the first time he just has Ralts, then he fucks off until the end of Victory Road. N was more of a rival since he was battled several times in BW.
>>aimed to please old fanbaseThe fuck are you on about? If anything it pissed off a lot of older fans because they could only use new Pokémon in Black and White if they didn't do the Dream Yard or Pokétransfer. BW2 gave us some old Pokémon but it lacked a lot of iconic older ones just being shitmons are unremarkable stuff like Zubat and Rattata.