I don't remember why Barrier was forked from Deskflow, but I've been using Barrier for many many years now. Now that I think of it, I do notice bugs, that maybe I should try out a new version to see if there are life improvements. E.g. with keyboard layouts, even when both systems are running Windows, the target system can be confused what character it should be outputing; and I need to hit "reload" to reconnect after returning one or both systems from standby, sometimes clipboard sharing also breaks.

For a workflow where you are also display switching (kvm etc), Synergy doesn't work well. You can technically use it when hosts are coming on/off display, but it's not designed for it. If you use a kvm-like workflow and have a Magic Touchpad, there's no easy solution without re-pairing, and I hope OPs tool works for this.