Features you won't have in the Receptor vs. a workstation from Korg, Yamaha, or Roland would be: sampling, sequencing, arpeggiators (KARMA in the case of the Korg M3), and a nice color view screen.

You really only need the screen at home (you don't program your synths on the gig, do you?

I often adjust effects and EQ during a gig, yes.

Receptor and PC3X would be quite the rig.

Well, adjusting the FX would just be a matter of assigning those parameters to controllers on your keyboard, and once's that's done at home, you wouldn't need to see what your controller is doing, you'd hear it; as for EQ, the "mixer" on the Receptor doesn't have eq, but I guess you could add a plug-in for that purpose, and then assign those oft-tweaked bands to controllers as well. Again, once the programming is done, the "tweaking" can be done at the gig without needing a monitor/lCD screen.

I know on my Motif, if I was tweaking eqs while playing, I didn't care what position the knob was in, I cared what it sounded like.

Arturia's CS80 was a little buggy, and since they decided not to play ball, they left Muse without the ability to improve/tweak/fix whatever issues might have come up. (Which of course was complete bs on Arturia's part since they made purchasing CS80 for Receptor a real PITA: you had to pay full list price from Plugorama, and then within a month of buying it, they pulled the rug out from underneath any support...I'd never use Arturia for anything after that.)