An achievements system doesn't appeal to me. I use Sonar to get work done. I'm not interested in earning badges, and the thing that would send me running for the hills almost immediately would be any kind of nag or notification telling me I could get some digital trinket for using EQ a certain way. I struggle to imagine anything more irritating and distracting, and I know a lot of guitar players.
More generally, and more seriously, the idea of rewards for
participation sounds totally reasonable. But incentivising certain behaviours is not only annoying, it's the exact opposite of analysis.