This is just from looking at numbers and the damage rating-equivalence of the other stats.
It looks like if a strong majority- probably more than 70-75%- of your damage is either Ranged or Melee tagged, you're looking at Loki/Hogun for DPS.
However, many builds use powers with both tags, and/or a lot of (Area) powers without that tag. For these builds, Hela would still be good. Brutal Damage Rating is less valuable, as you will be Bruting less often than before, but the relative value of BSR should go up.
If you are using War Machine passive (presumably with Iron Mans, and here I'm glad I've still got them as Foe powers), you are looking at 275DR (from 150% Spirit to DR) with Balder, plus 200 Health, which might be competitive with Hela straight up, but you will be passing up even more Brutal chance.
The Odin-build is more balanced, but actually looks to math out pretty well offensively (vs bosses), especially if you can use a fourth Stat for damage, i.e. Movement builds (not that that is a Rogue specialty). Good for adding survivabilty.
Any other thoughts?