RA2 is one of my favorite games ever, it's probably the only old style C&C that kinda holds up. Hope it gets the C&C1&RA1 remastered treatment. They should have the cutscenes for it unlike the older games. Atleast, I hope.
TBH, breaking down C&C per series is a pretty inaccurate way of looking at it. A more reasonable way would be 2D vs 3D, or maybe Westwood games vs EA Pacific/LA, because Generals onwards the "C&C" games don't really feel like the old games. Old style C&C games were basically the same game too, C&C1 and RA1 (and D2K) feel like (and are nearly) the same game, C&C2 and RA2 feel like the same game, and are also like the prior entries, just isometric instead of top down. Similarly, C&C3 and RA3 feel the same as Generals, and nothing like the old games outside of superficialities.