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I've still got the hiking watch face after upgrading. Checking the on-watch play store, it's listed as FitnessWatchface : https://play.google.com/store/apps/details?id=com.lge.watchface.fitness
After a while, my gwr has settled down a bit and is a bit more responsive now. I saw someone in another post recommend uninstalling some of the default watch faces, and that seemed to improve things a bit.