I think the current Reign is remarkably well thought out. Agree on creaky headset, and the BB and stack are little low. I'm also 195cm so would really like another 20mm on reach on the XL, or a new XXL size. Add another degree to the seat tube angle at the same time.
But: with 800wh battery I'm about the same as Bosch guys on 750,
power is more than good enough,
handling is really very good indeed,
maestro suspension excellent (way better than 4 bar, doesn't have that 'wallow'),
chain stays are a reasonable length,
head angle spot on,
seat tube is a 'real' angle (not kinked) and clear right to the top of the motor mount so you fit long droppers (I'm on 240 with plenty to spare),
cable routing is pretty easy,
it's already UDH so mech hangers easy to replace (and I like the 'rotate on impact' feature - saved a few mechs that), bearings are well thought out and easy to replace,
battery tech is pretty mature and mounts easily and reliably,
charger is fast compared to what you get with other bikes
I've had very good support from my Giant dealer for 2 motor issues and a blown Fox X2 over 2 years. Yes, I am concerned about what happens after December when electrics warranty runs out, but fingers crossed!
Would I still recommend it now? Yes. But at a reduced price.
EDIT - I must admit I am also very interested to see what Giant does next with the Reign and full power Trance.