tank lb is actually very useful in prog, minimum ilevel raids and ultimate. as recently as this patch our group used tank lb1 in e11s (cycles of faith) and in e12s (quietus + pulsars).

the reason tank lb rarely ever sees use in most other content is because LB is the last resort for mitigation. for one to consider tank lb, ALL of the party's mitigation would have to be insufficient or on cooldown (addle, reprisal, HoL/shake/veil/missionary, succor/noct helios, soil/CU/temperance, troub/samba/tact). This will never happen outside of flashy transitions and high end content; even with the buffs you suggested, simply cuz its not needed at that gameplay level.
The most use it could see in a casual setting is a tank doing a mass pull running out of cooldowns, and even then its a stretch.


as for healer lb, healers actions can bring people from 1 hp to full in less than 10 seconds, so LB1 and LB2 will always be underwhelming, but the mp restoration would give them niche uses.


I agree that DPS lb1 and lb2 are kind of underwhelming though, the huge animation lock kind of makes using them not worth missing the gcds, as youd do comparable damage vs just not using it. Dps Limit breaks should be slightly buffed either in damage or by reducing animation lock