Thank you for sharing this fantastic workflow.
I have an issue with Localforward options in the ~/.ssh/config file, it looks like they are ignored. This is what my configuration look like:
LocalForward 127.0.0.1:12345 127.0.0.1:8080
LocalForward 127.0.0.1:5555 127.0.0.1:55555
If I manually connect with "ssh myserver" the port forwarding work just fine, but it won't work through Alfred (I'm using the shortcut from ~/.ssh/config).