From the consumer side I can with for:
* streaming race weekends (all practice sessions, multiple angles etc...), I would pay for such a service
* better TV production (get them HDTV on board cameras already)
* better sound production (why do the current cars sound so much better on peoples mobile recordings then the actual production)
What I personally wish for:
* get back to the classic tracks (Imola, Magny-Cours, Nürburgring...)
* get back the gravel pit run-off areas
mistakes should be punished immediately
What the FIA should fix:
* look of the cars (2017 might still look silly with the high bulkheads, wide front wings, front wings sticking out very much at the front...)
* NO telemetry during Saturday and Sunday (maybe only black box recording, but no live access to them) -> yes, let the cars break down again
* NO telling drivers about strategy of others...
* less driver punishment of minor things...