I have used the SeaView UV coated mask for a couple hundred dives as my primary and I carry one for my backup. For me they are great for relieving eye strain and makes the colors a bit brighter.
As far as communication goes I think it's ridiculous to say I can't see your eyes so I don't know if you saw me..... When my dive partner and I communicate it's either with a light or with one handed signals. Part of that communication is the response, by either repeating back the signal or responding OK, nothing to do with my eyes.
With a mask, hood, regulator in mouth and back up regulator bungied under my chin, doesn't leave much face exposed for expressions.