Switching dosage forms of Remeron (mirtazapine)?

I've been on Remeron SOLTABS for 10 years for help with IBD-ulcerative colitis. I have my IBD-uc under control and wish to taper off of the Remeron, but, I was told that the SOLTABS (orally disintegrating tablets / orodispersible tablets) are not uniform and thus cannot be accurately cut.

So, I am considering switching to a regular scored tablet formation of it (keeping with same brand - I heard switching generics can cause problems) but am scared that first pass metabolism might affect bioavailability and cause symptoms. I'm afraid I may not be able to take the regular scored tablets.

Is there anything I should expect when switching? Has anyone else had issues switching dosage formulations?

Also, if I can't handle the switch of dosage formulations, is there any way I can crush up my SOLTAB and make small cuts from it that way, etc?

Please help.