Yeah, the concern is that cars are following too far behind to be in DRS range. That said, one of the main things we heard about over the last few years was that one of the main consequences of close following, was increased tire degradation, which seems to be much less of an issue this year with the new tires.
Honestly I think narrower cars would make a huge difference (and of course they went and widened them this year... SMH). Passing almost exclusively happens on the straights, unless you're Max Verstappen who is singlehandedly keeping races exciting (maybe some Vettel / Ricciardo in there).
Make the cars narrow enough that passing in the corners is feasible and I think it'd make a big difference.
Yeah, it's to where the only exciting races are the wet races. I've only been following F1 for about 3 years now, and Brazil 2016 was hands down the most exciting race I've ever seen.