This is the thing that the open source projects whose UIs I've been disappointed by always seem to tout: customization. I think it's great you can customize stuff, but I posit that the vast majority of people just want something that's ready to roll out of the gate. Something that's endlessly customizable isn't necessarily a "pro" to me; if people need to customize something a bunch to make it usable for them, you've built a framework instead of an application.