Surely this is a misprint or OP read wrong. Rogues were already ridiculous, well not mastermind or eldritch trickster but the others were stupid strong in and out of encounter mode.
If this isn't a mistake, then rogue has become the class with the best saves in the game. Even though Fortitude stays at Expert, you can just grab Canny Acumen as your level 15 general feat for Fort, so you have 2 master and 1 legendary proficiency save at level 17, with all 3 saves having success = crit success and one having crit fail = fail results.
Now rogues can basically poach the whole identity of monks with the exception of AC:
Best saves? Well rogues just overtook monks in that regard.
Unarmed attacks? Just go monk multiclass and grab one of the finesse stances. With the new Thief change that benefits Dex to dmg on finesse unarmed attacks, you now deal more damage with unarmed attacks than a monk could ever do using the same attacks they do.
Flurry of Blows you say? Just get level 10.
Move speed? Just use one of your way too many skill feats for Trick Magic item and get a wand for 2nd rank Longstrider (or new name Tailwind).
Ki spells? Well, you already are multiclassing monk, so just pick some up on the side.