I wasn't that crazy about Oldboy (though I appreciated that it was well done, just not to my tastes), so I have no dog in this race. I'm also, generally speaking, not crazy about foreign remakes, or remakes in general. It's not that the idea is bad, it's just that they're so rarely done well (my favorite example, few people remember the original Scarface, but the remake is certainly an iconic film).
But anyway, most people in the US do not like to watch subtitled films. Is it silly? Sure. Do I wish more people would watch them? Of course. But is that likely to change? Probably not anytime soon. We're all film geeks here...we have no issues with subtitled films, or old films for that matter. But we are VERY much in the minority.
So we could say that the average filmgoer should either watch the film the way it was originally done, or just not watch it, but that's sort of elitist. Remaking Oldboy has raised awareness of the original to a ton of people who wouldn't have watched it on their own. It also exposes the story (or a version of it) to a wide audience that did not know the original, and probably still won't recognize it as a remake. These people never would have watched the original. And most importantly, it can never "ruin" the original, which will always remain to be enjoyed.
Who knows? Maybe it'll turn out to be fun (related note: I'm looking forward to Brick Mansions, the American remake of Banlieue 13, still featuring David Belle). My perspective is skewed by a long-standing interest in folklore and traditional music which is all about reinterpreting past works, so there is that.
Sorry to hear about your pain, Loud Orange Cat. I understand and hope you feel better. We can definitely argue about Evangelion if you'd like
del Toro cites Tetsujin-28 as more of the influence for Pacific Rim, and from what I hear, there's a lot more Mazinger than Eva in the film (haven't seen it yet). Either way, in the words of Stravinsky, "good artists borrow, great artists steal!"