1. Magnum had an average demo-rating of 0.89 and 5.99 million live-viewers on Monday 9pm last year. After three episodes, "All Rise" has 0.63 (demo) and 5.65 (million live-viewers) at the moment. So yes, it's doing worse and the drop that usually happens in Spring hasn't even started yet. I doubt the show gets a full season order.
2. At the moment, Magnum has an average demo-rating of 0.60 and 6.25 million live-viewers. It's been 3 episodes and the ratings have been rising this week, so it can get better - or worse. It's doing better in audience, but a lot worse in demo than last season. For comparison: MacGyver had 0.70 (demo) and 6.11 (million live-viewers).
3. Ratings usually drop every year. Yes, H50 has lower ratings than last season, but the drop is really small. It's hard to say if it would have been different if it stayed at 9pm.
If you're interested, I wrote an entire blog post section this Friday about the ratings of all CBS crime shows at the moment; predicting which one might be cancelled and soon making room for MacGyver
You can read it here:
https://dashboardonfire.wordpress.com/2019/...boot-update-93/