When CnC3 came out some people were complaining too... I believe when KW was here there were people saying "not enough cyborgs in MoK, or where is the tiberium life" but the essential core of the game was true to Command and Conquer, leaving most people happy.
When CnC4 came out there was a very big outrage among the CnC community. So much so that it convinced the developers to fix it up in CnC5.
CnC3 is about fast paced action but it is also about building your base strategically. I don't think the modifications made to the gameplay that we see now in CnC4 were necessary at all. If you're camping most of the game in CnC3/KW, you're either 1) in a very special situation or 2) are a noob and playing redzone.
Don't get me wrong though, CnC4 alone seems to be a good game... but is it worth being called a CnC? Just saying.