Yeah... but it is what it is. One failed on day 1 and the other failed on day 5. It wasn't a case of deciding at the end of the course that the student wasn't quite meeting standards, but more of the student struggling to keep up with the pace of training that they had to be sent home.
Maybe some instructors add extra days at their discretion to handle this, but T1 at 6 days is already a long course.
I think it's also the type of performance flaw that they take into consideration. One of my C1 coursemates had a bunch of fundamental issues but still had great problem solving, teamwork, and most importantly wasn't creating a dangerous situation. Managed to overcome them one breakthrough at a time and was up to speed by day 5