Well, I agree with the workflow and knowledge base of SPLAT is ingrained in long time users. This reminds me of using LOTUS 123 for a decade and then having to use EXCEL.... close but no cigar. Years later, I still never got EXCEL to the same point as with my working knowledge of EXCEL.
So, just by 2 cents. I have thoroughly checked out alternatives to SPLAT. I worked in Pro Tools and Studio One to try and do a project. Neither had the MIDI editing tools I use and need. So then I downloaded the DEMO to CUBASE and must say, it is different than SPLAT but had the best midi editing capability of any of the three alternatives.
So, it's off to CUBASE world for me. It will be painful, for I wind up checking the manual for almost everything I need to do on a project. It is a slow go but persistence will conquer. I only hope that it doesn't take a decade to gain the same level of competence I had with SPLAT.
PS - just routing input/outputs to my APOLLO was a challenge (it is a two step process).