Haven't read the thread, but thought I'd say this, apologies if it's been said already.
I think they should get rid of pitstops completely, too many races are won / lost in the pitlane and the strategy room. That may be exciting for the guys behind the scenes, but to watch on TV it's incredibly boring. Get rid of pitstops, use some harder tyres and get a bigger fuel tank and lets actually see some racing on the track, who cares if the cars are a bit slower as a result.
I know there'd probably be a lot more changes needed to the cars, but the principle would be just to keep all the cars together all the time so we could actually see some decent tussells, rather than the continued monotony that is on now.