About Astrologian's LB my bet is that it will freeze or reverse time for 5s or so so that the boss / the mechanics will stop but you will still be able to move / get healed and etc (not to attack imo). Obviously my character would love to get some time based magic lol

in order to reduce the "hack" aspect of such LB and to prevent other healers from becoming useless i suspect that the next fights will have less insta death mechanics.

I mean, "time reverse LB" could save the day in Titan Ex if a healer get landslided out of the ring but it wont help in Ifrit Ex if you cant kill the nails fast enough (given that you cant attack under the LB effect) or if you cant coordinate enough to go through complex mechanics.

My 2 cts