It's a trade off, Tizen is the reason for the excellent battery life. I also wish it was Android but it's not a deal breaker. The other thing not mentioned is the always on display with my AW it drove me nuts trying to see the time while holding bags. AW OS 2 did help but I'm spoiled from my LG watch, always on is a must.No Google API can run on Tizen OS, so that will be a non-starter. I wish Google Apps could be added, because that would make the Gear S3 the best watch on the planet. I still plan to buy the S3 Frontier to replace my S2, so I'm not dependent on any phone. I think that is going to be the only way to go for the future of smart watches.
Seeing how I just dumped all my Apple stuff and picked up a S7 edge last week and a beautiful 9.7 S2 tab this week I really look forward to the S3 gear. I don't care what anyone says about Samsung stuff I think it's solid any fits my itch.