First of all my friend...RE4 and RE5 have great plots...RE5 basically put and end to the storyline that had been established in RE1...RE4 really helped set up for RE5 as far as the plagas go, and it set up for RE6 in showing how far Leon has come since being a rookie cop. It also showed Wesker's plan to collect all the viruses and developed more on Leon and Ada's relationship.Lulwut? RE4& 5 are some of the most horrible games out there when it comes to plot. Dreadful almost. It almost puts a dampen on some of the better storylines from previous games.
But I'm just nitpicking.
I can see where you're coming from for including non-playable characters in order to improve or progress the storyline. I can also sort of see where Princess bascos is coming from... Having Chris in two consecutive games as the main character (I'm not including revelations here as it's not numbered) is a bit much and to only have Jill as a plot device again would kind of cheapen her as one of the series leading characters.
(That being said. Jill was given Mercs and two pretty decent DLC games. It's not as if she was totally disregarded as a playable character in 5. Bleh. It's a difficult argument )
Obviously the BSAA has got to be in on this action and it was going to have to be one of the two.
I really do think that, in general, way too many people are complaining about the lack of Jill and Claire.
We're given Leon, Chris, Ada, Sherry and a brand new interesting character in Wesker. Jr. and yet people still complain.
Second, you should count Revelations, because it IS a main game...CODE: Veronica isn't numbered however it is a main game, so to not count it would not be fair.
Other than that, I pretty much agree with what you say.