Evolved mode has zero failure states

[Absurdity]

Oh that'd be funny actually, if it becomes more 'standard' to drop an OT in favour of another DPS. It's happened to the Healers for a while now, so maybe it's time the Tanks were also 'replaceable' to the same extent (I know there's been a couple of no-Tank clears of things, but they're not done nearly as frequently as no-Healer clears seem to be). I don't think it's good that any role is 'replaceable', but it will be interesting to see if A: it happens to OffTanks and B: if said OffTanks try to rationalize how it wasn't actually a problem when it happened to other roles, but now that it's come for OTs it's 'actually a very serious issue with the game that must be addressed immediately'

I think it's just as likely that the main-tank jobs get replaced, which makes this even funnier.

They have to design the OT jobs to be able to tank just fine, not just due to 4man content (which includes Criterion, so damage that actually hurts) but also because I doubt they will remove shared tank busters or "vuln-up" swap busters.
If they then also deal equal damage to the main tanks they will just be flat out better. More party support, adequate tanking capabilities and no need to "counter" bosses for their dps.

Overall that split seems nonsensical to begin with, not like evolved Paladin lost it's support despite being in the main-tank role.

We've seen with the dominance of SCH+SGE during quite a few raid tiers that this rarely works out as they intend it to.