I think you've experienced what many do during recovery-- a plateau. You're probably ready to crest the hill, but need a shove to get you over it. I don't want to question your commitment to therapy, but you just may need to gri your teeth a little bit harder on the ROM exercises. Or perhaps a few different exerises to change it up.
You didn't say how long you've been at your current ROM. I know folks who have had MUAs before-- you want to avoid that if at all possible. It's not the magic bullet. Even if they get you to 115 degrees on the table, that's a ROM you won't get when they wake you back up, or the epi wears off.
Best of luck!