Bitcoin development has never been so exciting - BU, XT, BTCD, bitpay Core variant and now bitcoin classic. This is what open source is all about.
Well, development is about developing new solutions to problems. Not about arguing whether a particular variable should be set at X or Y value.
If that's "development" then 1000 versions could spring up each one having their own proposal for that particular variable (max block size). How would that improve anything? That's not development.
In the end of the day the only people making work that will actually help bitcoin scale more => are core devs.