I wouldn’t say “everyone”, but yeah, there was noisy resistance. I think it was probably just general change resistance though, or a matter of the changes being big and sudden. Now we’re used to the current style, and it’s been working fine. We generate a lot of Temp Health (on some setups, too much in my opinion) and while it decays faster than it used to, it still can carry us easily through encounters. And even with the current decay speed, it’s often quite enough to carry us through any lulls in the combat too, at least in Legend where both the targets to generate THP from and the encounters to keep it up are frequent enough.
I’m not quite sure if removing the delay completely would be a good solution, but it could be tried. Halving it would be quite fine in my mind, though, to still give enough window to use bombs and potions without an extra penalty. Some Talents’ and setups’ rate of THP generation should really be looked at, though: For example, Zealot can generate so much on a single Talent (for me, Sigmar’s Herald/on cleave) that there’s no need to look at additional ones. I do think, though, that it would probably be wise to limit any changes to the new difficulty only (and actually use that to bring some of the difficulty), unless FS wants to make another big change to the style THP works.