Was surveyed If I would exchange 1600SP BUD for SP rollover. I would definitely not make the trade. The 1600 and 1800 SP mid tier benefits do keep many going for CX after the 1200 threshold - and I reckon this is a group of loyal customers and CX should let such budget go so easily!
I can certainly see myself more on SQ, BR, AF if they made such changes. DM+ is not practical for most of us here. What can you actually get out of it?