Rubbish! i dont like it! & i dont like the fact you CANT switch back to the old one! Yes we will all have to get used to it but this is just my oppinion! i use that site at least 10 times a day! I may now choose a alternative.. i'd give it 4/10
It's called progress/upgrades/redesign/revamp whatever you want - keeps somebody in a job.
As for dumbing down - perhaps. Radio 1 has always led the field in this e.g. a Newsbeat report may say the word "mortgage" followed by "this is the repayments system for the money you borrowed to buy a house", dumbed down for the naive out there.
Preferred the old iPlayer but I suppose we'll get used to the new one - not much choice really, is there? A bit like ISPs - We're changing the Ts&Cs you signed up for - if you don't like it, go somewhere else.