"David
Realistically McLaren will look towards 2015 when the Honda comes. I expect next year will be a 'development' year towards that car. With that in mind they need experience through this phase. They HAVE to keep Button. Perez, although relatively new, brings more $ and more experience than Magnussen. Have a look at how Grosjean has come along with Lotus sticking with him through tough times. Perez could do the same and will have plenty of experience come 2015.
As for Hulkenberg I would love to see him in a decent car, but I worry if he went to Lotus it would be as bad of a move as going to Sauber was this year. Lotus has no money obviously, they are still awaiting their angel investor. Next years Lotus will be seriously under-developed.
Perhaps my fantasy moves would be Perez to Lotus so they get some sponsor money. Hulkenberg to McLaren with a view to a championship challenge in 2015, and Massa to Sauber.
Well I do accuse Formula 1 and its fans of knee-jerking all the time. Perez was an excellent driver last year, and that hasn't changed this year. It's much like Button's year at Benetton (2001), where everybody kneejerked into thinking he was a bad driver.
If you want to kneejerk though, please note that Perez scored more points over the last six races.