It was stated in the live letter that RDM, RPR, MCH etc were having their respective gauge-fill skills transformed, so that it immediately launches you into the corresponding follow-up move(s). This will not 'work' for Reaper (Forcing Enshroud after using Plentiful Harvest) because this proposed change has entirely focussed on high level dungeon play and nothing else. And is probably not a good idea for the other jobs either.

More often than not, you are in the overworld and are going to be left standing by yourself in a pointless and wasted enshroud mode with no enemies to attack, as the initial opening Reaper moves will down all the enemies most of the time, accounting for all zones on average and general gameplay activities (not to mention being forced into Enshroud mode in trials and boss fights- right as the boss disappears from the field for the next special move). Being able to 'bank' the 50 points of Shroud Gauge as current lets you then choose when to deploy Enshroud. You could be doing a variety of activties- from leves, Hunt marks, tribe quests and end up Enshrouded right as the battle ends, and probably will. Especially since Enshrouded transforms your characters appearance- it is a fun thing, and not being able to control it takes that fun away. Of course, you can still build up Shroud Gauge from using Guillotine, Gibbet and Gallows- but this just becomes an unnecessary time-consuming detour in order to play with things like Enshroud.