[EA15 beta] Custom Style -> pick/apply style doesn't work + difficult to use

[Guillaume]

I'm playing with the custom style diagram (new property) which can be useful to produce a "decoupled formalism view" of a class diagram, BPMN process...
Having applied a custom view for an element, I wanted to apply the same to another element. Unfortunately the pick/apply style (paint brush) don't take into account this type of style.
e.g. change a BPMN task to an ellipse and rotate the title -> this is not applied when I pick/apply onto another task.

Trying to transform a BPMN diagram, I found that it's difficult to move/place elements and connectors around. As a custom/free view, I'd expect to have a smooth use in creating this diagram ("powerpoint like"). Unfortunately it's actually harder than using BPMN.. Moving intermediate events (rendered as triangles), they're not positionned where I released the mouse click.
I also noticed some glitches in the way labels are rendered - for instance if you use an intermediate event, the label position does not match the selection (center, top left, etc.)

As a final comment, I noticed that my elements are no longer rendered as BPMN once I disable the Custom Style property - a constraint to be aware of is that it does not let you switch from a standard BPMN (or other language) to a custom view and vice-versa.