Just first impression, may be it will improve with some more play:
Basically I don't like all the shaking of the mech cockpits, after playing 20 minutes I just had to stop. I also think it makes the game more "noisy", lot of sounds, voices, shaking. I feel something has been taken from the game rather than added. Overdone IMHO.
About the balance, it is too soon to give an opinion but I think that now both the Owens B and The Osiris B are mostly useless as *starting mechs*, the damage is too spread to be effective. Mechs with gauss still make a much focused damage, so it is Uller or nothing. On clan vs IS servers, soon you will see everybody on clan side at start.