After installing the Leap 42.2 RC on my MacBook (4.1), the touchpad sensitivity is WAY too high. A USB mouse works fine, but not the internal touchpad. The strange thing is, that the touchpad works properly during the installation process, but is overly sensitive once everything is installed. I installed the synaptics driver, and that now has my touchpad working properly again. 2 questions,
Is it a good idea to rely on the Synaptics package long-term? I have read some things that suggest it is not really maintained anymore, and everything is moving to libinput?
Assuming it is NOT a good idea to rely on synaptics, how do I go about changing the configuration under libinput to match the synaptics (and the installation environment) behaviour?
While that is true, I would stay with what works for you at this stage. The new input stack is work in progress, and submitting a bug report is the best way to get any hardware-specific quirks addressed.
FWIW, an interesting libinput discussion concerning macbook hardware here