I've noticed that there has been alot of complaining about this new update (and usually rightfully so) but next to no helpful suggestions on how to make these troubled features better (besides reverting back to the last working 1.10, hehe).
As far as snapshots go, why not return to the old system, where the snapshot is taken instantly and can be auto-deleted by the next snapshot that comes without delay.
Keep the thumbnail sized preview, but this time add a button to show a full sized preview if the person wants to stop and see a bigger version.
You can also stick in a more/less button like in the build tool that hides the new fine tune features that were added on the new version.
I would also recommend adding a check box option to save snapshots instantly to the players hard drive, for those who are taking action shots and would prefer to get lots of pics and go through them at a later time in their native image edittig software on their computer outside of sl.
I think little things like that would make for a nice hybrid between the old set up and the new without changing how old timers generally use the tool, while offering them a chance to experiment with and learn to use the new features when they are ready to.
Just my 2 cents. =)