You won't get a better series link in my opinion than what's available with the vix image and the autotimer (or, installing and configuring autotimer manually). Until someone gets the source code and a way to transfer it over to the duo, from the sky boxes, then this is the best you'll get...
As for virtually all of the rest of your requests, it's likely just going to be kept as "hopeful"...
How many other boxes can dowhat you've asked?! OK, the azbox can do some of it, but then again, the azbox can't do half of what the duo can...
Then, you have the dm8000. What can that do better than the duo (apart from modular tuners and up to 4 tuners), than the duo!? Not really worth while money is it?! So, if the duo came out with the features you want, but cost the same price as the dm8000, would you still pay the extra money for it?!? I don't think I would ... those features aren't worth £400-£500 to me!!!