this used to be the case in Moodle 1.x but led to all sorts of problems (e.g. matching evaluators to submissions was not random, so you had the early birds marking already when others hadn't handed in, people having to wait for submissions to be able to start giving feedback, ...)
I prefer the new phases and have used the "new" workshop successfully in asynchronous scenarios.
Give it a try!
Best from wintry Germany,