I've already seen the combat in ACM and I think everything will be better than that. The creator of this mod said he will recreate the AvP 1 combat system which means very fast and agile aliens, not toned down for the consoles. Even this small feature is enough to say that the mod is better than ACM. The MP will come along the line for sure since the code is already implemented in the CryEngine, everything is there so this guy just have to make first person models for the aliens and you have got yourself a working multiplayer.
Btw to say nothing to compare to is funny. We can compare the atmosphere, the sounds, the PR models. ACM is lacking of these so far - the atmosphere is no where scary as in AvP 1, the sounds are wrong and the PR model is still messed up and I doubt this will change until the release.