I think what Hearts have done is great, but let's face it...they were in a league where 5 teams are part-time and a 2 are still self-harming (3 if you include Livi).
Don't agree with shouts for the inclusion of Hartley either. Dundee have, as can be seen from recent accounts, been over-spending (again) and that should NEVER be rewarded. Same can be said for Ross County.
IMO, nominations should be made up from Managers who have achieved beyond that which could be expected based on the resources available. So, from the Premiership this season, that's pretty much only ourselves and St Johnstone. All others are about where you'd expect them to be or lower.
Probably would have been other suitably deserving nominees from the lower leagues. QotS & Stranraer kinda stick out as over achieving this season, but I don't follow those leagues enough to really say for sure.