So I'm running 9.3b1 on my 6S and the beta on the watch and there appears to be a calendar sync bug. My corporate account is in Office 365. My watch either shows no calendar items - not just for the day, but for the week. Depending on if I add other calendars in (like my Gmail or personal Outlook), I might get 1 entry for a day (I have like 10 things scheduled for today). Battery usage is horrible - the phone is hot in my pocket. I have the Apple battery case and both the case and the phone are drained by 3pm, and it's primarily calendar to watch syncing (https://dl.dropbox.com/u/853747/Jing/2016-01-20_0839.png)
I've:
1) reset watch sync data
2) removed corporate O365 account and added back
3) reinstalled watch and phone.
4) adjusted calendar entries.
Anyone have any other suggestions?