[Paraview] Python interface differences between ParaView 2.6 and ParaView III

[Milan Frank]

Hi all,

recently I have tested my Python script with ParaView 3 executive. The
script has been developed with Python interface of ParaView 2.6.

So far, I have noticed several changes in the interface (from 2.6 to 2.9) :
1) I was in need to explicitly specify render interactor style (there
is no longer a default one).
2) UpdateDataInformation method is no longer part of the vtkSMSourceProxy.
3) I am getting "RenderModuleHelper not set" error from vtkSMLODDisplayProxy.

At this point I have stopped my experiments and decided to post my question.

Is now the right time to migrate to the ParaView 3?

I guess there is several more things different. So it will cost me not
negligible effort to accommodate my code to the changes. I am
concerned about the amount of modification most likely to happen in
the near future in the server manager part (and its python interface)
of ParaView 3.

Any hints will be appreciated as they will help me to plan my work better.

Thanks,
Milan