It is a problem for 1 reason. Recruiting.
This program could be hampered by 2 recruiting classes (2016 and 2017) by keeping an interim coach for a 2nd interim season. I see multiple reports from current verbals looking around, which is not good for signing day in 2 months. Then to expect any decent talent to verbal for 2017 is crazy.
Long-term, you're right the AD will fix it, but if they fired both (Beckman and Thomas) before the season, we would have an AD by now (I would hope). Said AD could've hired a new coach during this cycle, which only completely impacts the 2016 class instead of 2 classes.
Not firing both in August could impact the football program for more than 2 seasons, imo. I hope I'm just being too pessimistic, but I feel I'm being rational at the moment. Thoughts?