Would be cool to see the likes of
Lightning claws for close combat

http://warhammer40k.wikia.com/wiki/Lightning_Claw

A good power sword and a bolter on the offhand will make me a happy Black Templar.

If I don't have to be a Space Wolf because they didn't implement BTs anyway.

How would grav-weapons even work? like compared with how they work in tabletop how to you transfer that into a video game without using dice rolls? (i seriously hope there isn't dice rolls!)

These are called RNG, good Captain. Dice rolls you don't even see happening.

I understand that but i don't want a game that is controlled by (supposedly) random dice rolls.

Ditto. I'm not a korean to enjoy that stuff.

Perosnally I would just like to wield a Force Hammer.

Just gimme a power sword and some sort of pistol and ill be fine.

Heavy bolters, Krak Missle launchers... Plasma Cannons... anything only a devastator has the love for.

One of these