I'll weigh in on the watch dog issue.
My home layout is small, just a couple of loops so I run them both on the variable channels for a specific reason. I like to be able to shut one loop or the other off from within the app, I do however use command control 98% of the time.
So I configured the minimum starting voltage in the App & DCS remotes to 21.5 volts. Why not 22? Because when I start the VAR1 or VAR2 channels at 22 volts, the watch dog is missed 99% of the time on all engines (PS2 & PS3). This is a TIU issue as it doesn't matter if I use the remote or the app to apply the track power to have this happen.
This isn't a big deal as making the adjustment to full voltage is just one extra tap on the screen.