To be fair Stephen, CBBC has for many years now had an "upper age limit" of 12, so unfortunately the programming won't be catered to your age range. Your age range is most likely being covered by Radio 1 and the efforts they've been making in video, which has, at least in the daytime, been focussing on younger and younger audiences ever since Ben Cooper took over.
I happen to know this being a radio presenter, although there's other forums for this.
I think the problem lies with this great contract of brilliant live studio based programmes (eg. Blue Peter) sitting alongside gimmicky patronizing entertainment shows (Pop Slam being a prime example) then in-between are a great team of faces who are really great at entertaining although have to work In a cheap studio environment, the CBBC Office, where they're using PowerPoint to produce the graphics.
Personally, I would remove the 'office' studio, leaving Newsround alone, and broadcast longer community segments, some 5 minutes whilst some are 10, from the actual CBBC Office because they are located in BBC Bridge House which has perfect views onto MediaCItyUK that can be utilized to produce mini programmes, simply refered to as the Office.
To see how this could possible work, here is a great interview which was recently put up onto CBBCs YouTube Channel.
Link:
http://m.youtube.com/watch?v=Up24p1DUJNY
I believe this change could be the start, then take a detailed look at all programmes and cut any that are simply unnecessary.