One thing that I personally find frustrating is that some forum creators want to be everything to everyone, as in create their own CMS and do it badly when there are other well established products out there.
For example I use Wordpress and won't be changing that. It would be wonderful if there was a simple solution to plugin Xenforo for my wordpress comments. I end up with one discussion on the forum and another on the blog. It feels such a shame that the two can't be merged.
I could suggest the same for something like polls. I recall years ago I used UBB and you could take a poll from your forum and stick it on your website homepage. It was quite clunky but the idea was great.
Is there anything like this available for Xenforo or anything thinking around that?
Those are just two examples, but the kind of plugging elements into other products and websites really appeals to me.