It's a poor business decision on their part. Not only are they undermining their own integrity, but they're undermining the value of their own releases, as well as the potential for future income.
Not if they know people will stampede to get ahold of the remakes. Quite a few people who own the originals (some of which got them from the secondary market like I did) would be interested in the new ones, regardless of whether or not they keep the first run. You said "potential for future income" so it's basically the same idea. Just depends on how sure they are of themselves. Judging by what we've seen, it's clear a handful of angry collectors won't be enough to make a dent in their financial gains this year.
As for undermining their own integrity... well, not very many companies out there see that as a thing. Especially HT, a company whose definition of 'limited' or 'exclusive' is based purely on price and the fact that there is a finite (albeit large) amount of figures made. The generous usage of those words is what seems to be angering collectors these days.
I'm kind of used to it by now.