After doing all of the EX primals as BLM, most notably Titan and Ifrit, the class just feels very handicapped in those particular fights.
Garuda is mostly alright, but on Titan and Ifrit, the repetitive moving and breaks barely long enough to get off 2 casts just kills BLM dps. Effectively every time there is a Landslide, Plume, Vulcan Burst, or Eruption, our dps goes from good to "spam Scathe and RUUUN"... which is about 1/3 of our proper dps at best. Or better yet, having to break numerous casts to make sure you dont die to mechanics, effectively wasting several gcd's.

This leads me to a nice simple request.
As a BLM, Surecast is one of my least used skills, because it only prevents you from being interrupted by damage. A lot of unavoidable aoe attacks do not interrupt your cast these days, and the ones that you have to avoid force you to break your cast due to movement.
So we can solve the issue of Surecast's usefulness, and help the movement issue in one fell swoop with the following change.

Under the effect of Surecast, your next spell cannot be interrupted, and can be cast while moving.

Though TBH I was thinking that it would be even nicer if the effect lasted not on 1 spell, but simply for 6 seconds, and remove the 15% chance to instantly refresh Surecast, instead making the trait raise the duration from 3 sec (1 cast) to 6 sec (2 casts)... Though that may be overkill.

This adjustment will do absolutely nothing to BLM dps in standstill fights, but it will help lessen the burden of constant movement during damage critical phases.

Any thoughts?