Question

and the Studio one 3 could put phase check on each track so would be faster see if any track this phase out

Answer 1

You can do this yourself and save as a template to use for future songs.

 

However there is no value to put a phase meter on a single mono track, as it takes more than 1 track to have a phase issue. Its more effective to put a phase meter on the main out, or a buss, and solo the tracks you want to analyze.

Answer 2

It could be useful, indeed, especially for those working often with multi mics intruments. Right now you have to insert Mixtool, tick phase invert box, then bypass the plugin in order to check the phase correlation

TIP *** save the preset of the Mixtool, and insert it where/when you need it. (with drag&drop, of course )