You are probably suggesting this to the wrong people. It's likely to be people connected with the developer team who decide on such matters.
It also seems likely that they have already discarded this idea.
Before any forums were created for SP 2010 I was consulted on how different forums had worked for SP up to then; on the need for specific forums for SP 2010; and on naming standards.
The names for the present four are almost exactly what I then proposed. (InfoPath was later added to the name of the third one).
At the time it was imagined that soon after the first four forums (public beta release time) there would be several more 2010 forums. Not however as many as before as some (think Community; Accessibility) were hardly used and some (think Social Computing
or Collaboration perhaps) had unclear names / topics covered.
One of the ones that was then envisaged was an extended Business Intelligence one that would include both the then present (now called "pre-Sharepoint 2010") Business Intellgence subjects (SSRS; KPIs for instance) and the various Services which you
mention here. (At the time there was an Excel Services forum; this would in effect have been combined with Business Intelligence and at the same time Access Services etc. added - including PerformancePoint Services which earlier (as a Server) had had its own
forums).
I expected these other (I think four in number) forums to come by RTM at the latest and had to scramble to change text in my book (and in the chapter that was the only part of a second SP 2010 book that I wrote) to reflect the fact that they didn't arrive.
As they are still not there I don't think there is much chance of them ever appearing. Feedback which I much earlier got for the earlier set of forums - where I was spending a lot of time as Moderator moving posts to the correct forum for them - was that
it was not important where a "customer" posted his question provided it got an answer.
If you follow that to its logical conclusion we should I suppose be relieved that there are four SP 2010 forums and not just one even if no-one seems to be bothered that posts go on a seemingly random basis to the General and the Setup/Admin forums
(and are never moved) thus making in effect one of those four forums redundant (and leaving space for a BI one :) ?).
SP 2010 "FAQ" (mainly useful links):
http://wssv4faq.mindsharp.com/default.aspx
WSS3/MOSS FAQ (FAQ and Links)
http://wssv3faq.mindsharp.com/default.aspx
Both also have links to extensive book lists and to (free) on-line chapters
