New Gabriels Angelos voice actor is terrible. He has no depth of voice compared to the old one.
Tactical marines - they have bolters which are supposed to be assault rifles, meaning they are they should be shooting more than one bullet in a row. But visuals don´t match that. It looks like they are shooting single fire instead of bursts (like they did in DoW2) or full auto (like DoW1).
Assault Marines - chainsword sounds seem to be cut.. its sounds like they are starting it again and again with each swing instead of one continuous roar like it was before.
Also they seem to be swinging it bit too fast which makes them look like the sword weighs nothing.