I'm not a fan of it either, but I gave the event 2 hours and given there wasn't a lot of assistance (initially), would've meant a lot of waiting for other groups.
Next time - numbers pending - I would love to have 2, or even 3, fights occurring at the same time. 15 minute rule can then be scrapped.
We will be holding the next FSL Event on 28th April at 22:00 Altdorf Time. Norkalli and I will be looking for new locations to host the fight