Finder freezes when samba automount not found
This is one of the things I wish Apple either handled better or displayed a network blocking indication so users can know when things are being help up.

This is an issue even on the 10.11 beta builds. It is an issue with Apple network mounts, SMB mounts and other network interactions. Finder just blocks for network resolution by design.

If you can submit a reproducible situation where you can measure the delay to Apple - that might help them code in some more performance into Finder. I have filed about 5 bug reports at https://developer.apple.com/bug-reporting/ and it's not clear they are going to redesign anything from what I can tell.

Perhaps if enough people submit reproducible issues (mine are all slow downs and not complete blocks) with sysdiagnose showing the block then this might get addressed as a bug in the design.