Why is it that the required levels is 95 when at CoTF missions it were 85. The levels have "always" been max level - 15. So from that formula, the required level in TDS should be 90.
That's weird it wouldn't let my alts into Cotf group missions until they were 95 (same as TDS) do you mean HAs? If so it wouldn't matter since they can't progress to do the latter ones until 95.
CotF should have been lowered down further to 75 i think The reason TDS are 95 is probably because all the progression is 95 and all but the initial one in Tempest Temple is behind progression
Wild guess but Heroic Characters are 85 and I'd suppose those lower than that who don't choose that option are sufficiently satisfied with not being in near current content and the acceleration they already receive.