I agree with SlowerOne. Loads of other classes are suffering by far too many people trying to stick their own 2p worth in. 12th scale racing is really popular at the moment and I would hate to see people leaving this great class by others wanting to change rules to suit they're own needs. Yep, there has been a problem with cells over the last couple of seasons, companies have taken that on board and hopefully releasing new sub c cells that don't suffer from the same problems as before.
As for the question about speed with 6 cells vice 4, I personally think that a 4 cell car will out perform a 6 cell car due to lower weight. Certainly the only time you would gain a slight advantage would be top speed but with most tracks, you would not have a big enough straight to get much more top speed from your car.
I haved 12th cars with 6 cells and 4 and think that my car is plenty fast enough!
Cheers guys, Chris.