Personally I'd be happy to see it binned. Several reasons, in no particular order:
IIRC it is anticipated to save around 15 minutes off my fastest journey from the North West to London but the environmental damage of the construction is concerning. I don't see how that can be justified.
Communities seem to be being divided by the line. A chap who I was dealing with through my work spoke of his village being cut in half by the line. We discovered a couple of years ago that our village will be cut off from the nearest settlement, which contains doctors, dentists, opticians, high school etc. None of which are available where I live. To use those facilities, will after the line is constructed, require a detour of around 3 miles. And if you don't have a car tough luck. The bus service which links settlements will disappear. If you walk, a long section of the detour is on a high hedged winding road without a footpath. - A road which will be busier because of HS2! Where I live cannot be unique. Amazingly, an industrial park, which relies on road transport for everything and which was due to be severed in two, was subject to some last minute changes of route
Journey times North West to East are poor with appalling operators. I would much prefer to see the money spent on those routes.