Read your following comment.
@YvetteLans and I have been working with ClickUp for quite some time, but permissions is probably the only thing that is working well inside ClickUp. The system is very fragile and bugs happen all the time. Yes, the permissions in Fibery need improvement, but like they said, it’s not that easily done.
There is a big difference between Fibery and ClickUp and in the way challenges are handled. It looks like ClickUp is choosing to add as many new shiney objects as possible. Making the framework of the software unstable, slower and buggier. While Fibery focuses less on shiney objects and fast implementation. In my opinion, Fibery is choosing quality over quantity. Good solutions, without compromising the quality of the software.
Most of the times, you can create a workaround to get what you want for the time being. Up untill what you prefere is a native function in Fibery.
Just wanted to share our experience with you before you make a choice. 