Chris - what do you want?
Sounds like you want Wipeout 2097 sometimes.
Regarding assumptions stated as fact.
In the UK - F1 coverage is commonly cut to allow for a very lame soap called Coronation Street to run on time.
Driver interviews are often cut entirely or show only Lewis Hamiltons comments..just like after Spain.
The money for your F1.5 is not there. The largest consumer market on the planet does not even host a race and does not want to..so where are the new fans going to come from for a series the casual viewer could not distinguish from F1?
We are bothered as we follow F1 seriously. I have watched F1 since 1985 and have missed 7 or 8 races in that time when they were shown live. I also get the Speedtv footage for the mondays after a race and watch that too. I am not a casual fan by any stretch, nor am I a zealout. I love motor racing. I watch everything I can from local races near me, national races on TV for ford fiestas/mins whatever. I ride 10 trackdays a year on my motorbike and am commited to learning how it works and how to go faster and also how the setup of my bike can influence my laptimes. If you asked anyone that knew me what I know about..it would be motor racing.
In short - I am the kind of fan that would look at a contrived series like f1.5 and think it was rubbish.
We do not have an impossible problem to solve with F1 as it is. We need to recover a bit of the pasion back from the corporate suits and make it a racing series. Overwhelming technology is good and I agree that some of the restrictions we have do not make sense - especially AWD (opposed to 4wd) and the use of forced induction. We could have 1 litre motors knocking out 750bhp easily and all sorts of ideas to ensure extra efficiency..but that would not be F1. We need the best drivers using the best cars to the best of their ability.
Your ideas might be better suited at the GT classes rather than prototype classes. Make the technology relevant to road cars and there becomes a point that it makes sense to invest in it.