im not an e280 user. But I have the new sansa view. And maybe the v2 works the same way.
If I synchronize my view in MTP mode the ratings and the playcount is synched back from the view to MM. Maybe this works also with the v2 players.
If this doesn't work with the e280 v2 I think you have to read the information from your player using the windows media device manager kit (dont know the correct name).
In MFT mode the only problem I have found is that the "Track Properties Change" notification isnt fired

HTH
Ulrich