This would be right if I use my machine for testing only. But it's not the case. I use this machine to do actual work. I test new packages only in case I miss a feature or experience a bug in latest stable version. So far it works great, but downgrading is very time consuming.
I think I'll have to make the automated tool for it myself. So - it won't happen in nearest future - too much work.
My point is - Ubuntu/Mint is for everyone. Debian/LMDE is for power users. Power users should test new features. And yes we can
But a little automation to this process would be nice feature for LMDE.
If not a dedicated alpha tester, but actual power user would test the latest available packages - it could be useful to whole Debian community. I mean tests in everyday work, and in the quickest possible way. I described with details where the problem with downgrading is. Instead of testing for removal of a package for downgrade, the same scenario as for upgrade should be used. No removal test for dependency test.