What's the problem with FastReport? It took me 3 days to:
1) Learn FastReport from scratch
2) Create report templates
3) Write ISAPI dll to get ready reports as PDF using Delphi's WebBroker application
I can get reports in any format FastReport supports, and now just running my reporting isapi dll alognside with my UniGui applications on the same server with zero problems. When I need to show user some PDF report in browser, I just create an UniLabel with http link like
<a href="http://somehost/reportserv/?report=sometemplate.fr3¶m1=1¶m2=2" target=_new>Print</a>
That is how real FastReport Server works (which is ISAPI dll too), but it is not free, so I just read it docs and made my own one working the same way.
I don't think Uni team should spent their time on reporting problems, since there are many report services available already or you can always write your own service.