nothing can be said about the suppression.. in the bf3 demo they didnt use supression aswell. so that could still be way diffrent in the actual game.
it seems like they updated the shaders alot and the sun is less bright although still pretty bright. animations look identical but those could be placeholders as they could be still working on updated animation sets. they tried some new things with the new tagging system and side iron sights.
overall I dont think this is very good but it isnt bad ether. I wouldn't be surprized if EA pushed dice in releasing another battlefield so soon. The fact that bf4 was announced when not even the last bf3 expansion was released is really dissapointing...