TBQH, delves below 6 are indeed quite useless IMO.
They offer no challenge at all, pretty much like the early M+ tiers of old.
I agree with you that reducing options is not a great idea, however we do need more delve tiers as it stands right now, because I’m going DPS Brann with a DPS role char and solo stomping T11s, while still far from my gear cap.
This should not happen.
As for the M+ removed tiers, instead of simply making a +12 the new +2, they should have just fixed the scaling.
new +2 = old +2
new +3 = old +6
new +4 = old +10
and so on.
Rescaling would have been much better than simply cutting out the lower tiers.
More than anything, high tier delves would require more than simply +hp/+dmg.
We need added mechanics at certain breakpoints, just like S1 had the extra nemesis packs.
S1 delves were kinda great as they were, ngl, except maybe for the rewards.
On-topic, this OP has been talking about delve changes due to voices in their head, they lack sources, it’s not anything of substance.
They had another topic about “molten crests” coming to delves that would enable mythic track gear for delvers.