We seem to be doing the same thing as the FIA; making up new rules that might make it more exciting, but it just makes it confusing!
Surely F1 should be the best, that means the best of everything - tyres, engines, aero, brakes....... That's why I think they need much more relaxed rules so the teams can design what they want and they will be a lot more different to each other.
If the issue is money as you said (3 or 4 teams will wipe the floor with the rest), then put budget limits on them and let the teams decide whether they want to spend it more on tyres or engine development etc.