When I reviewed the Fitbit Sense two years ago, it was an ambitious smartwatch. Its successor, the Sense 2? Eh, not so much. It’s hyperbole to say the Sense 2 is a complete downgrade, but I don’t think you can truly call it a smartwatch, either. This, my friends, is what I’d call a premium fitness tracker — and if you view it from that lens, it’s a good one. But is it really $300 worth of fitness tracker, especially since the Pixel Watch is only $50 more, has nearly all the same…