I'm finding scouting decent as it is right now. Not really anything wrong but not too interesting either. Only real problem I see would be if you're playing a map larger than the number of scouts you get like Toranth mentioned.
If the seeding of ai tachyon coverage changes it might be a bit more micromanagement to avoid what's there which might get annoying fast if you can't remember where they are. But I guess it would be quicker to clean them up if you want to if there's fewer.