So melee is one of the key things in warhammer. I feel the current player melee weapons visuals and effects are way to

Size - they look small. Small compared to your character, all of the other weapons and the shield, half of the enemy weapons, and above all - any original GW model ever made, or any WH game I have ever played. It is especially prominent with the 2 handed weapons - the greatsword, the eviscerator and the thunder hammer look like the 1 handed version you hold with two hands, they barely extend enough and you look rather stupid with any of them equipped. 

Effects - or the lack of. Most attacks currently feel weightless, like this is just a piece of metal, not a power weapon. There should be better visual and sound effects to add "weight" to your attacks (especially standard attacks) and make them feel as strong as the numbers. Half of the time I can just as well be a Jedi swinging a sword made of light that effortlessly cuts (and explodes?) enemies.