The Moto 360 is a great watch, and its flat tire sensor means that unlike other watches without one, we benefit from auto brightness etc. But it can look unsightly. I overcome this by manually adding a small black-to-transparent fade graphic just above the flat tire. It makes the transition less sudden and in many cases the flat tire becomes unnoticeable.
Please add this as a checkbox in options:
[ ] Add fade above flat tire on Moto 360
This will then apply that fade to all watchfaces automatically.
(I've shared this idea before but now it's nowhere to be found on this site, frustratingly. Seems such an obvious addition!)