As a regular driver going about an ordinary commute I dislike smart motorways, but as a recovery operator I much prefer them as it's a lot safer when recovering a stranded vehicle, the lanes need monitoring more as when people break down it takes too long to get that particular lane closed, but I would rather recover a vehicle from lane 1 than the hard shoulder, nobody can drive in a straight line every now and then we all get a bit close to the lines in the road, I've lost count how many times I've been almost killed by someone drifting over into the hard shoulder, whereas with a lane closure it funnels the traffic slowing it down and speed limits being in place.
I do think they need to be reworked and more thought needs to be put into them though. So I am neither for or against smart motorways.