Bumping this as this severely affects BLM for the upcoming ultimate, putting it at a severe disadvantage compared to other DPS classes. Some other notes:

Unlike other classes that are mostly able to work around poor substats here and there - this patch there are 5 slots that have no spellspeed on them whatsoever. Weapon, Head, Gloves, Feet, Ring 2. Melding spellspeed can make up some of the difference - but when the respective caps are 531 (Weapon), 301 (Head/Gloves/Feet) and 226 (Accessory), we're missing out on over 1000 spellspeed (after melds are taken into account).

Not only is that our most favored stat, but missing out on that takes away a lot of the intricacy of the class - enabling you to do F1 skips more often for example, and being able to fit in more procs for movement. The class is just far more fun to play with lots of spellspeed. When another class gets a bunch of undesirable substats - the rotation doesn't change significantly like this.

Since 2.1 i've been asking SE for up-gradable 24 man gear. Would that be a good solution for Ultimate world prog? Absolutely not - unless they suddenly gave a weapon and accessories, didn't put a lockout on 24 man gear and delayed ultimate for a week. However what they can do as a short term fix is what OP has suggested - fix the weapon stats to at least bring us halfway to the stats we have lost.