When Jose came over he made everyone master the art of time wasting. I remember Chelsea coming to the lane and sitting on an early 1-0 lead. Every throw, goal kick, corner, freekick would be a minimum of 1 minute to do.
We do it too, nobody will admit it, but in a recent close game, there was a stoppage, and we somehow got the ball back to Ederson, who picked it up and blasted it to row Z, referee didn't notice, so no action taken, he did similar last season a couple of times.
Its not ideal, but the amount of times we get large chunks of time wasted against us, when we are level or behind, and never get it back, I don't blame our players for doing it back when we get a late goal.
If they are to make sure that 30 minutes each half is actually played, then great, it won't cut it out entirely, but it will ensure that a fair amount of time is played. If it does reduce the time wasted, then they can always make it 35 in the future. We attend to watch football, not watch people roll about, or walk slowly off the pitch, the more football I see the better.