Thanks very much for taking the time to write and say that you enjoy using Dorico. We love to hear that feedback! (We also appreciate constructive criticism and suggestions, of course, but it’s always nice to hear that your users feel that you’re basically going in the right direction anyway…)
Thanks also for your suggestions concerning Engrave mode. All of these are certainly on our radar, and indeed a couple of them will be addressed in the next update (custom prefix/suffix for rehearsal marks, and better handling of measurements that follow your choice made in Preferences throughout the program).