The problem with the fantasy crap is they gave all of the DK fantasy to unholy...Frost is an Ice Warrior. Frost should have been Soul Reaping and Frost Damage and Unholy should be All pet/disease damage. I've personally hated the artifact idea since they announced it because if you choose wrong...well it's basically a big F-U. I'm having a ton of fun on my other classes right now, so will have ZERO problem rerolling if frost ends up being shit. I don't hate the current unholy(in fact I think it's the most fun it's been in a long time) but if it's supreme for another expansion then they clearly do not care about making frost a valuable spec.
Also, it does have that effect, but lets say they buff frost for 7.2.....and it ends up ahead of unholy...If you haven't or didn't upgrade the Frost artifact then that's your problem to begin with. I feel like by the 2nd tier...you should have at least 2 artifacts fully leveled, that's excluding the bonus damage filler traits. Possibly even three..So, it at that point shouldn't matter what spec is better. OR the better solution is Allow Artifact respeccing. This way they can buff and nerf accordingly without people feeling like they wasted Artifact power.