I'm a bit confused why you have an issue with Mardave.
Mardaves have always been a controlled 'Stock' class, the core of its racing was around a cheap, easy to maintain chassis with cheap, available parts. The beauty of the original design is that its still strong, cheap to maintain and fast and tunable.
Recently, the circuit side of Mardaves has become a larger concern, and the inevitable move to lipo and brushless is coming. Due to this, Chris has moved on and evolved the cars, bringing in the diff, and then making more subtle additions to enhance the handling. All still using as many of the std parts as possible.
The new Schumacher car looks impressive, but its starting with a blank sheet. They also have the benefit of being a larger company who are able to make big batches of the kits in China, so they can undercut Mardave who are a smaller operation and still get their parts made in smaller batches in the UK.
With 2 cars available, it will mean clubside shops will need 2 lots of spares, so may carry less of both.
In fact, once you muddy the stock class you would get the age old thing, People may think one is better at the local club (as its driven by the best driver, but nobody accepts they are not the best driver) so people will swap over, then a new competitor will come along and everyone will flock to that kit.. Essentially you will have an emulation of the TC racing scene, but on a smaller UK scene which will fizzle out as everyone might as well go and race TC's
Doomed I tell ya! your all doomed!!!!