You made a suggestion. Myself and others replied to it with criticisms. You've warranted your suggestion as necessary because "people avoid tank stance". I ask how it is any better if they use it 100% of the time. The 50% damage reduction / 100% healing on tank stances, and an increase to boss damage dealt to warrant it, overshoots healer/tank parity between tank modifier reduction and healer GCD by a ridiculous degree, and would essentially remove any prospect of tanking without the tank stance active, and for a fair bit after if even a single AA can crit during a Shirk-less tank swap.
The exchange in viability and necessity in the timings of particular mitigation or curative tools due to incoming damage rates will absolutely newly lock out skill actions over time, in this case painfully limiting the available windows from which you see a breakpoint effect. It may not be an inherent lock-out as in "Only available during Shield Oath", but it will effect much the same.Increasing the gap between damage taken in and out of tank stance won't lock anything more than it currently does.
If there's room to debate whether you should use your tank stance or not, especially when ease of play favors the non-optimal choice, then it must be approaching a very solid balance point as is. I'm not saying it's perfect -- I too would prefer a tighter parity, though from slight adjustments to the tank toolkits instead -- but it's a far closer than your suggested version, imo.They really only be a tactical choice of who lose part of its DPS to make sure the team survives, the healer or the tank. This tweak is really only there to please more than one type of tank/healer, since there is a constant debate wether you should use your stance or not, or if you should heavily DPS as a healer or not. That's all.
Yes, they could, and certainly would need to be reworked under much greater detail and firmer guidelines than this in order to approach a greater healer/tank parity, if that is your goal, because it is far more than adjusting numbers generally.Of course, they could be reworked deeper, but it's far more complicated than only adjusting numbers.