The old FASA Star Trek RPG tackled the differing Klingons in a pretty good way. The ones in the old episodes were the product of "Human-Klingon" fusion. The base (Worf style) Klingon is the "purebred". They even threw in their own "Romulan fusion". Always thought it was a common sense way to retcon something like that for story purposes.
No, giving them forehead ridges in TNG was style over substance.
You've got it backwards: Turbo-nerds like you and I are the only ones who who would notice such a change in the first place.
TNG Starfleet is a military in denial about being a military. Recall that in TOS, Kirk explicitly refers to himself as a military man, whereas in the TNG era, Starfleet officers are embarrassingly coy about their role as the armed enforcers of Federation policy. It's somewhat analogous to Canada going from having one of the largest militaries on earth at the end of WWII (granted, most of the competition had been decimated) to drawing down the Army, Navy and Air Force and combining them into the nebulous and rather vaguely-defined "Canadian Forces" a couple of decades later, while telling anyone who would listen that "Canadians are peacekeepers, not soldiers" for roughly the next half-century (the increasing degree of socialism in both societies along the way is probably not coincidental, either).
It's probably fake since the source of that rumor is a post on 4chan.
Good thing The Scene is taking care of that for you with webrips. As for Romulans, TNG established that they're different enough from Vulcanians to the extent that they can't accept blood/organ transplants for them, which might suck if one of their deep cover agents gets in some kind of accident.
The TNG movies shit all over that by dragging him back and making him a depressed drunk or something in Nemesis who ended back at his old post. It was an especially cruel move since Worf had been blackballed from further promotions in Starfleet
