I was thinking about it last night and I realized that there would have to be such huge buffs to frost that it is just not going to happen. The issue is simply that we have limited sources of damage. The reason frozen pulse is good for everything is because it gives use another source of damage. This is also why trinkets that add another damage source are so strong. Think about it, our damage sources are:
Strikes - 50% ish of our damage
Auto Attacks - 10% ish
Frost Fever - 5% ish
Stupid Swords at our sides - 8% ish
Frozen Pulse - 7% ish
Razor Ice - 3% ish
Then we make up the rest with sindragosa, trinkets, potions. So where are they going to buff? If they buff the strikes (frost strike, obliterate, howling blast) it will make DKs super top tier because of the burst damage it would create. Buff auto attacks? We would need something like a 300% increase to make up the difference.
Look at unholy as a comparison. Think about the pets, Ghoul, Skulker, Army, Gargoyle, etc. There are so many sources of damage that not a single one needs to be OP and hit hard for it all to add up to big numbers
Strikes - 28% ish
Auto Attacks- 10% ish
Pets - 28% ish
Plague and Festering Wounds - 18%ish (could argue festering wounds goes with strikes)
Death Coil - 6%
Shambler - 3%
Pots/trinkets/etc - $7%
So right now, I actually think that Frost simply has a major mechanical flaw because if you buff it up to do damage competitively then you risk making them so strong at burst to shadow everythign else. Think about your frost strike hitting for 300k instead of 120k. Think about how silly that would be in dungeons and world content and that is the kind of buff frost would need to function. Really, frost just needs more sources of damage.
Really all this does is expose just how poorly executed the frost artifact is. This is where we should be getting extra sources of damage. Instead, it is just buffing the small supply of sources we have currently.