I personally dont like the customer teams as it really just masquerades the problems, after all what if one of the manufacturers pulls out because they have a bad season. How will the money be shared out to the smaller teams . It all sounds a bit like motogp with satellite teams against yamaha, honda and possibly ducati.
The difference is that in Motogp they provided concessions and unlimited development for ducati and new entrants whilst frozen the the big boys. This at least provided Ducati with some success in getting parity.
Sauber highlighted how DTM allowed Mercedes to catch up whilst freezing dev for BMW and Audi to improve competition. I guess no one wants to see a 1 horse race except for the leading horse.
All the while Bernie sees it as a show to make money from sponsors nothing will really change. Hence his comments about drivers adding value and how Lewis is good for marketing F1.