OK, I've only read the first two pages of comments before starting to type this - life really is too short.
My feelings about DRS were fairly positive when it was first brought in, and in the early stages of its usage.
The free-for-all usage in quali was way too much, so that abandonment is a good move.
My current thought about it is a bit like putting sugar in my tea.
When I were a lad my mum made my tea and, to get me to drink it, she added increasing amounts of sugar and milk because tea made her way was very strong, well past the boundary of bitterness, and very hot due to being boiled rather than allowed to brew.
In later years I didn't feel the need to scald the inside of my mouth by gulping down my tea, so the milk was dispensed with. This, in turn, allowed me to discover that the taste of tea is, in fact, really rather pleasant if brewed using the water's residual heat. From this point I rather quickly weaned myself off the over-usage of sugar - and found that my visits to the dentist were also more pleasant!
Now I drink tea more than ever, no milk or sugar, and savour the real taste - but I do still add a small spoonful to my black coffee.
So, to translate; DRS made F1 palatable to the chattering classes who needed more continuous thrill-fixes for when they weren't watching WWE wrestling, However, we'd be better off with less of it, or none at all, if the racing itself can be re-brewed into a more exciting sport without it. Failing any foolproof (or Newey-proof) way of doing that it should used more sparingly.
Odd numbered laps only
, maybe, no usage allowed for 3 laps after new tyres fitted
- and no multi-zone races at all.