Yep. A single Marauder can drain anywhere from 20-30 morale per second from an entire Warband in theory. Two would mean Order is permanently at 0 morale.
Order's morale boosters are fewer in number, on weirder classes. The WH morale drain requires attacks from behind, and is in a decidedly non-AoE tree, so that isn't going to work too well on an entire Warband, for example. Excluding the fact that WH's aren't exactly meta in WB play.
Some comments:
On Chosen M2:
"but feedback was largely positive for the existing effect."
+300% heals, by my calculations, is roughly +6,000-35,000 willpower for anyone healing you, depending on the spell and its stat contribution.
Roughly, using a single target heal and healing on average for 1500 before crits, the +4500 would require 4500/3 (stat contribution) * 5 WP modifier =
7,500 willpower to emulate. In order to get a HoT to tick for 650 +1950 that healer would need 1950/1.5 (stat), * 5 (for each tick) * 5 WP modifier =
32,500 willpower in order to equal this much healing.
It can make even hot ticks of the much-maligned heal+hot heal for 800-850 on a crit. For all intents and purposes, if you have a healer in your group or some hots on you, you are immortal. For 15 seconds, vs. the Ironbreaker's 5 seconds.
Lets compare to the KOTBS, where consensus was this:
"KotBS already have some rather significant ways to boost their stats, adding in 720 points of Morale stats that stack with those is way overkill"
+240 is double the AM/Shaman's AOE stat debuffs. It's three times KOTBS/Chosen auras, SM/BO stat steal, or RP/Zealot marks. 1.5x some Scout/Mara stances. A few rare tactics/abilities grant net +240 stats on hit. These are all abilities that essentially have 100% uptime. The KOTBS morale provides the equivalent of a top-line skill for about 30 seconds. It's very good, and versatile, unique and helpful. But I think if we're calling it overpowered, we need further justification.
The +720 stat does not compare to the +7000-35000 incoming Willpower that the Chosen gets (which for all intents and purposes, is a personal stat for the Chosen). The Chosen ability has no answers anywhere on any realm. An Archmage with Desperation (+40%), Magical Infusion (+25%), RP Tactic Buff (+25%), Knight Tactic Buff (+15%) does not even gain a bonus equal to
one-third the Chosen effect. To get
one third of the effect of a single M2, Order needs three tactic slots on three classes, grouped, and the target must be under 25% health. Whereas the effect of the KOTBS can be duplicated/canceled out with one to three passive AOE abilities that don't cost anything.
So using the argument in favor of changing IB M2 (e.g. immortality is too strong), the Chosen M2 should probably be reduced in duration by one third.
With the argument for nerfing Knight M2, the Chosen M2 should probably be nerfed to less than one third of its current power. A reduction to 10 seconds and a 100% boost would still grant it the equivalent of +thousands of incoming Willpower, and it'd still excel the combined tactics of three classes (while it's up). It would be, give or take, 90-100% immortality depending on the Chosen.
As for Wings of Heaven, there are only two AOE morale snares that I'm aware of (WOH and Squig Goo). Removing this entirely from Order would be a problem.