The PS posted an article over the weekend on how the assistants were told they were being terminated. In it, it was noted that they were all told they needed to turn in their phones, keys and laptops by Monday.
This is unusual. The assistants typically stay on board and continue to recruit, schedule visits, etc. until the new HC is hired and it is decided if they will be retained or not.
Based on this, it sounds extremely unlikely any of the assistants are going to be retained.
I would also think this move indicates Coyle expects to make a hire extremely quickly, and has a good idea who that hire is going to be. Would assume the new hire told him that he has no interest in the current assistants.