I had asked this in the past to Vanatec and the reaction was somewhat "positive".
Perhaps you can let me know if / which of / when the following items might be added to the product:
I could imagine support for views, either per reverse mapping or (better) per "forward mapping" using attributes and/or configuration settings to define the "origin" of member variables and to define the (database independent) SQL to create the view.
2) Defaults, Constraints
It might be in contrast to the pure "concept" of OR/Ms but I think It would be great, if we could define these in the application (attribute/config) as we can now for indexes.