What's killed some of my enthusiasm for F1 in recent years is the gulf redeveloping between the top teams and the rest. I'd love to see it like 2007-2008 again where if one of the fastest four cars spun at the start or lost a front wing they'd have to fight just to get back into the points. Nowadays if Bottas loses half a lap with a puncture you know he'll be 6th again by the halfway point.
I remember in 2008 especially that if you were a Williams or a Honda you'd struggle to get into Q2 most weeks like the Toro Rosso or Sauber drivers today, but with one wet race or safety car you could suddenly get 4th or 5th if you kept your head straight and drove well.
DRS is part of the problem as it makes recovery drives much easier but even without DRS, at most tracks it would be pretty easy for a top three car to cruise past the entire midfield without much resistance.
Hopefully this year the Renault, Force India, McLaren, Alfa Romeo, Haas league of cars is more like 0.7-0.8s slower than the top teams rather than almost 2 full seconds.