is CSGO starting to look like r6?

they have the shields in the danger zone update... next thing is it will be implemented in competitive mm

Not really, the shields have always been existent in previous versions. However, there is a cs mod where you can operate a drone (as in r6s) and all similar stuff like that

Yeah, they're probably not going to ever add shields into competitive play, because it would completely destroy the fundamentals of gameplay elements that the game is based on.