Just caught up with the last 2 episodes, I just think the BBC have run out of ideas, ?

It's not up to the BBC it's up to Steven Moffat who wrote them. I assume you're talking about Season 5.

How do you mean 'run out of ideas'? Did you find it unoriginal or derivative, or what?

I don't mean to sound rude, but the usual criticism of The Pandorica Opens/The Big Bang is that the story got far too complex...

Maybe too many ideas. Try this explain of the BIg Bang:

http://www.youtube.com/watch?v=fmGHAl8j5b0

What a clever and funny vid. And now I'm, like, always a bonus.

To reply to the OP......

Please could you specify which episodes you are referring to, as they can't be The Pandorica Opens and The Big Bang.

I personally was not keen on TBB for various reasons, but none of those reasons were that it was short on ideas. There were so many ideas that we are still debating them on this forum

I didn't understand a word of anything in those two episodes. I can confirm they did not suffer from a shortage of ideas.

Maybe the OP means the last two episodes of Last of the Summer Wine?

In which case, the OP may well have a convincing argument to put forward.