You are most likely concerned that this is more controlled than an actual emergency would look like?

It might not necessarily be an issue. The steps took only split-seconds anyways from what it sounds. Shutting down the main engines helps to escape but appears to not be required for a successful abort. The order might be required though (e.g. the commands need to be sent before the connection between the vehicles is severed) or just beneficial (maybe to give the turbo-pumps of the main engiens a few more moments to spin down already).