I'd like to see an EASY way to prevent a collection of leads from synching to CRM. My present issue is leads from embargoed countries. I don't even want them in SFDC. I'd also like an easy way to setup these designations - e.g. in a lead partition, or members of a program, etc.
I would also use this for other scenarios such as staff, testers, etc. There are a variety of situations where this would be extremely helpful.
The thought of having to go in and retrofit hundreds of campaigns to add in exclusion steps for something like this is depressing.