Unfortunately don't know why those beams appear on newer cards honestly, for my end which has an old VGA (Ati HD6770) it works like charm with no issues.
For the 1st picture I cant understand exactly what you trying to show me there, but if you refer to the Orc Boss then I can only say that it might be something wrong server side, on my side it was presented normally.
For the second picture I don't see an issue, the crab model was working normally since BETA version of the mod, and for the 3rd I can say that something has to do with the positioning of the helmet models for the new character models from WoD, which was made by Balsh. I believe that isn't so visually bad, just remember that we tried and did our best in order to make those models coop/work with the vanilla game version, referring to Balsh, Me and Leeviathan.