Good morning, First of all, let’s make no mistake, the midi track assignment memory in midi import is a magnificent and really effective idea. That said, when you have several different midi sources, for example notator, logic audio platinum, logic pro etc… the habits were different and each files and users could have similarities but different ones. A selectable memory option, such as user presets, could have incredible power so that a set of files from series “b” does not cancel the memories from series “a” Thank you very much 
, I hope you find the idea useful. Sincerely, Thierry