I could pay £40 for an original copy of Watchmen #1.
I could pay £10 for a book containing Watchmen #1 and eleven more of them.

Original duals will lose some value if\when they get reprinted, but they won't be worthless because there will always be collectors who would rather have the older version. The reserved list is bad for the game, and good for the collectors, but ultimately Magic is supposed to be a game. Like the graphic novel collections cited above, it's meant to be enjoyed by as many people as possible and the reserved list is damaging that. By all means slap them in a core set and watch the originals lose some value, but then watch as they regain it when people want to pimp their decks.

It's a game, let people play it. The collector's market can cope.