As Tomasz pointed out the barriers are no greater than any other service we use. so there is that. Also we're at the point where there is an actual ask which need prioritization, having it on a wikipage is great for conversation but does nothing to help me prioritize it against other work my team is doing.
I'm trying to make it as easy as possible for community members to make asks of the Design team, and make UX review requests, but its a balancing act, and our time is valuable too, so we have to meet in the middle. I'm happy to iterate on the process, but this is where we are for now.