Yes the game has been changed a lot. First of all characters have different percent of speed, type of armor, weapons. Mendoza owns Blue Tiberium Rifle. Side-arms are gone.
There are new maps since beta 5. One of the Renegade X Devs created: CNC-Valley (Released) and CNC-Ash (Unreleased)
Community people have created custom maps, some of them were added to patches.
New maps in patches:
CNC-Valley (HappyConscript)
CNC-Eyes (Dakuja)
CNC-TrainingYard (Thommy)
CNC-Crash Site (Ruud033)
CNC-GrassyKnoll (Schmitzenbergh)
CNC-Snow (Henk)
CNC-TombRedux (Thommy)