I wonder what has changed in the DRS system this season? Not sure why it would have needed a change as it worked fine before.
With regards to tyres I'm firmly in the "these tyres suck" camp but realise there are other ways around the issues other than a all out tyre change. Hell even if they had more tyres and didn't actually have to start the race on the qually tyre it would be a better system imo.
There's a new standard ECU in prep for 2014, but both McLaren and the FIA have said it isn't that. My money is on someone not playing ball with a contract.