The HMH Overlay is anything but cheap. If it wasn't for that overlay we would still have the mouldy smelly carpet, the old soundtrack that was missing parts and didn't work half the time, the old lighting, a non floating Madame Leota plus lots of other things. And the new A/A figures they put in, far from cheap. I love the HMH overlay and look forward to going on it every year.
I enjoy it while it's here, but I hate the fact that it takes away the regular Mansion for so many months out of the year. This year was especially hard since they extended it for the refurb. (Which was soooo worth it, but still.)
I finally got to see HMH last October and thought it was a great change, it was a fun twist to the HM. It is only up for a short amount of time but I'd never want it to replace the original attraction.