dalgard:viewmodel version 0.9.1 has been released together with dalgard:jade version 0.5.0, which solves some of the problems that have been discussed.
The 0.9.0 version of dalgard:viewmodel was a major refactoring of the code base, which included a number of optimizations and improved debugging through ViewModel.nexuses. At the same time, the package was moved to Meteor 1.2.0.2, mainly for native ecmascript support.