Antonyms for the phrase "correcting mid-course" would be phrases or concepts that are opposite of making adjustments during a process. Some possible antonyms could be "staying on course," "maintaining the status quo," or "resisting change." These antonyms suggest that, instead of making adjustments mid-way through a process, one should stick to a predetermined path, continue doing things as they've always been done, or avoid making any changes altogether. However, it's important to note that, in many situations, making mid-course corrections is necessary to ensure success and avoid the negative consequences of staying the course or resisting change.