Don't get me wrong, I LOVE minibosses. However, both of them spawn for me every 24 hours. I do think the old spawn rate was too low, but the new spawn rate is a little too high. I think the spawn rate should be turned down a little more to make it more rare and exciting to find it.
I think the problem before was that they were too rare to find. Personally, I like it how it is. If anything, the drop rate of rare items needs to go down a bit.
I don't really care about the spawn rates, it's just the fact that marlix armor went from 100k to 50k.
There's a PS setting to turn off the ability for Minibosses to spawn around/near you. If you dont like spawn rates, simply turn it off.
So....turn it off for 10 minutes then back on. Some of us like the rates. And theres no real reason to tinker with it when you have the ability to control if they spawn or not