IMO this: https://github.com/OpenRA/OpenRA/blob/fe129956bb1b3f7e3231c1... is the most exciting part.
Tiberian Sun remains my favourite C&C game. I know it was rushed and had some bugs but... I mean: The Forgotten? Absolutely there should be a mutant commando walking around with a portable railgun, physics be damned!
I like C&C3, but it isn't TS and I feel it abandoned a bit the direction TS was taking us.