Would I gimp myself for going that way over frost ? Im a good player but im not spectacular so if its to far from DW frost Id probably wont make it to gold.
Highly depends how pulls are made if you are playing UH, for example chain pulling is where unholy is going to shine being able to keep 15 stack NP from pack to pack and have 2nd Unholy spec for ST. I assume you haven't done gold at all yet so frost might be a better fit if it's not a group that runs them regularly.