I think I see where you're coming from here marc, the racing itself outside of the DRS zones was great as it was down to driver skill to get past in most instances (I'm guessing you've got Button/Perez, Perez/Alonso and Hamilton/Webber in mind with this). Thing is to me this was only the case because the track only really had two overtaking zones, and they were both hugely aided by DRS which is why there was such fighting in the middle of the circuit because there was little room to pull a clean overtake. Plus tyres meant there was such a huge contrast in outright speed between drivers, Button and Webber just went backwards on the last two laps.
Catch 22 really, tyres DRS and kers will give you racing like we saw today on some tracks, on others it will just give you a procession of simple overtakes in a straight line.