In my experience, nothing is perfect. No system caters to all users perfectly and I'm not just referring to just the watch face design world. Each of us view our world through our own goals and tolerances. One person's good enough is another person's nightmare. Just like there isn't just one smart watch. Some will swear by Apple computers others will stay with Windows forever.
Look at the earlier version of windows and the blue screen of death. Has windows improved since? Yes. Would Facer and other platforms improve over time. Yes. Are they perfect (depending on how one defines perfect)? Nope. Never will be. But does it work most of the time and good enough to be supported by people who support them? Likely. If not, then it dies of natural causes.
All I have been trying to do is figure out based on all your experiences what path best fits my personal target. Really appreciate all the opinions.
I don't know how long Facer and other platforms been around, but my guess is that this is still early stages in the standard product life cycle.