Will Apple ever add full iTunes functionality to it's Devices?

I have been having a chat with a few people about Apple products and I think there is one final piece (fairly sizeable) that is missing from their iOS on such devices as iPhones/iPads/AppleTV.

The ability to access more/full functionality of iTunes.

I suppose I should say I'm fully in the Apple Camp.  I like their products, I like their software and I like the way it fits in with my life and the technology I use.  I know it is not for everyone, which I accept, but for me, it is.

The only thing that currently annoys me is that if I want to download (either ripping from CD or (in my case now) downloaded from iTunes or Podcast sites) and save music to my home NAS, I have to boot up some old laptop and open iTunes that way.

If I download a podcast from my favourite site (Hybridized) or purchase the latest Renaissance album (for example) that will download to the device I have (iphone/pad).  But there is very limited space on these devices, and I would like to have them saved within the relevant iTunes folder on my NAS drive.  To do this, I have to open up iTunes on a laptop, and download it AGAIN in order to have a saved copy.

I do subscribe to iTunes Match - and I know this keeps the songs/album in the 'Cloud' but I wish Apple would allow you to save your music directly to my NAS when I download it.

Anyone else feel this is the missing link??

A slightly bored PJ.