Flares are like bending your fingernail backwards and walking on it. Flares hurt tremendously, if they are engaged with the ground.
Keep the bevel maintained or the torque is back on, along with the pull of the old pathology.
When the flare is disengaged from the ground with the bevel, the jamming up on the wall from the ground stops and since there is no more upward pressure, the flare relaxes and comes sliding down the wall, even wanting to puddle at the ground, so it seems worse, before it gets better...all part of growing out. It will settle down. So good go, Casey. Brave enough to maintain that bevel and with active flare, tweaking every week is perfect for staying on top of the trim between farrier visits!
Removing flares will not cause rotation, but he should have been booted to transition that foot properly. Could have been something else done to the hoof in the process, like over-trimming, trimming before the ducks got in order, not protecting, leaving excess bars, thinning the sole, thrush, long breakover..... but not flares.
With boots/padding, the magic is in the pad itself. Everytime he steps on that pad, it gives in, then bottom's out and gives back...saying to the bone...get back up there where you belong...with every step. Flat footedness will improve greatly in 4 months with pads. It's the lack of bone protection from the ground that feeds the arthritis now. If he's lame now, booting him will make him a changed horse instantly with the comfort. Hope this helps.
With the right protocol, underrun heels can be fixed also. They can bloom into negative palmer angles that are very hard on the DDFT, right where it runs past the navicular bone. Looking at underrun heels for long time is not necessary and won't linger if the proper trim/movement is promoting. Booting here also helps...extra padding at the heel when he needs it. Put the frog to work and strengthen it so it can support the heels and help that heel first landing. The heels and frog are best buds. So go after thrush, nothing can build when its being eaten away.
Sorry, I didn't mean to come in on everybody...just want to help, maybe give some food for thought.