I haven't ridden the 29er Meta power unfortunately, but I've ridden other 29er ebikes and for ebikes I like 27.5. My normal pedal bike is a 29er so I'm not a hater.
The heaviness of an ebike obviously takes away some of the playfulness of the bike and by keeping it 27.5 you gain some of that...
Thanks DK! If I can get hold of a 2019 I'll be sure to test it out. For what it's worth I don't think you'll be disappointed with the coil, just make sure its sprung correctly for your weight.
I've ridden a friend's Meta Power which had the Rock Shox coil and it felt great!
I have the latest firmware on my bike and it worked fine. I think it's definitely worth a try, just to see if you even like or notice it being derestricted.