Simply put: please make saving times faster.
Either
a) reduce the time needed to save, or:
b) move the saving process to the background so it does not interrupt the use of Studio One.
Sure, if you have 30 audio tracks saving is pretty fast. Having 100+ instrument tracks (Kontakt, Play, etc) takes almost 10 seconds. It would not only be a time saver (as I save frequently) but also removes this annoying "interruption".
Probably this can already be greatly improved with only saving the instruments, channels, tracks or events where an actual change has occurred as opposed to saving the entire project every time.