Well worked with spriter for last 2 days, found these feature requirements, not sure if any of these listed before or already have some solution, I am anyway going to test it for next few weeks and uploading assets on scirra store. So will keep updating as I go.
1) Z order needs a change. when we drag and drop any body art, it always come at the top, it should come on top of the last layer selected in the z order. This will remove the hassle of dragging layers from the top to the very bottom, especially when there are too many parts.
If that is not possible, provide a shortcut key
say ctrl + up down/ arrow, for moving the selected layers in z order up and down. Shift + ctrl + up/down arrow to move them to the very top and very bottom respectively. ( similar to photoshop layers)
This will make the workflow very fast.
2) in the edit menu, try to add customized keyboard shortcut settings, so we can change and add our own short cuts, for example zooming in and out ctrl + and - are the default zooming in and out for many browsers and software. Its bit awkward to press ctrl + alt +space. so if we can edit and customize shortcuts, that will help. ( unless this is already implemented and I have somehow missed it)
3) The animation timeline when docked cannot be stretched after a particular height. If I undock it it can be streched to show all layers but that misses the point. It should be like flash where the timeline can be stretched to any height even when it is docked. In turn making the canvas size smaller when time line is stretched so it makes the canvas still viewable, even if it is small.
I have not started animating yet, so will keep updating once I test it more. Till now spriter has been very stable, probably it has to do with high RAM and Graphic cards my work station has.