My slight fear of dumping WP is for SEO. I know, I know, it shouldn't matter....but get this....
On my drone site, despite there being good content in the forums and in WP (WP is the front page, etc.), the Forums currently get about 1/10th of the page views!
It may be that, once I dump WP, google will pick up whatever front page portal I use and run with it. But it's definitely a gamble, IMHO.
The WP part of the site was up for about two years (I've had it only 9 months). The Forum has been up about 6 months.....still, both are integrated in various ways, so all things being equal goog should be sending a lot more people to land in my XF pages.
Again, it might be because goog is a bit old fashioned and likes WP and the two year old foundation....