Got some bad news . A poster over on this Gearslutz thread
https://www.gearslutz.com/board/new-product-alert/1276901-reason-studios-announced-today-reason-11-now-available-4.html#post14239863
in post 112 reports that there seems to be a problem with the plugin not correctly reporting to his daw (don't know what that is atm) proper delay compensation. If true this is huge and then some.
edit for update:
Turns out the poster talking about delay compensation is putting Reason Rack into Blue Cat Patchwork and then into Harrison 32C. Asked him why he's not going direct into Harrison and he couldn't be bothered to answer that. Told him until he puts the Reason Rack straight into Harrison then he has no legitimate complaint. Upshot is there might not really be a delay compensation issue.