Thought i would let anyone having issues with vmsvga and fullscreen/resize know what fixed it for me. While using vboxsvga kinda worked i wasnt happy with performance, An drives me crazy when i cant get something to work lol.
Anyway, after longer than id like to admit messing with it. I found a fix. Atleast one that works for me. Enable AUR and build
virtualbox-guest-dkms-vmsvga, restart and done. vmsvga with 3d enabed works like a charm.
On a side note if you get sick of the warning that appears every boot up. Simply delete
Hopefully this will save someone the headache