You must not have been on these forums when Morrowind was released. The hate directed not only at Morrowind but at the players who liked Morrowind was ugly. It was so harsh I had to stop coming here for a few months. It didn't let up until a month or two after Tribunal was released.
But... you joined these forums about six months before Tribunal going by your join date. And if you were gone for several months back then... well, it seems odd that you'd have a chip on your shoulder from maybe a few months of jerks.
Even besides that, if we buy that the tone was the same then as it is with Morrowind fans criticizing Oblivion (and I'm not sure I buy that - I have seen some examples of what people were like back then and I've talked with more than a few people about it, and while a lot of people say that things were harsh back then the kinds of things they say Daggerfall fans would say never seem anywhere near as directly insulting as how Morrowind fans who dislike Oblivion
always talk about the game) then going by what you've said it ended around the first month of 2003. Morrowind was released in May of 2002, so that would mean that you saw what the release of just about every game sees: a sudden rush made up of a handful of jerks who come in, scream at everyone, and then leave because the new game isn't like the game they liked.
Basically, let me put this in perspective: from what you're saying, people were ripping at Morrowind fans for about eight months after release here. We're past
four and a half years after the release of Oblivion, and Morrowind fans are still doing the same thing. There's no equivalence there.
You're correct, but this has nothing to do with what Borbarad and TES_Ronin said. The issue brought up by their posts is not "does an optional feature impact the game?" It is, rather, "Why would anyone dislike an optional feature?"
We all know fast travel impacts the game. I know of no one on either side of the fast travel debate who would deny that. It is precisely because fast travel impacts the game that it is necessary to point out now and again that it is optional.
Two things:
1) Fast travel in Oblivion isn't really optional, because quests are designed with the specific assumption that you'll be using it. If you don't use it, there's a huge amount of quests in the game that force you to walk the entire length of the map. If you aren't using fast travel, the main quest becomes almost unplayably boring.
2) People dislike optional features because
every feature in a game, optional or otherwise, has an influence on the overall tone and feel of that game. Even if someone doesn't use fast travel, the fact that fast travel is available in the game has an impact on the feeling and believability of the game world - the knowledge that you can instantly teleport to wherever you'd like to go changes things, whether or not you ever use that ability.
EDIT:
Morrowind's was perfect IMHO. It was realistic.
Actual realism is rarely perfect. In Morrowind's case, the fast travel system didn't cover nearly enough locations on the map, as I recall it wasn't possible to actually plot out a route unless you had it memorized which towns could bring you to which towns (which... isn't realistic at all, since if there were a network of silt strider operators they'd likely be entirely capable of telling you what route to take to get where you wanted to be), and every station always had a silt strider in it that never moved, whether or not you paid for it (again, not exactly realistic).
That last point's easy enough to respond to, since it'd be extremely frustrating if the silt striders were almost never in because they were off delivering people elsewhere... but the minute you bring that up you're admitting that realism isn't the end-all be-all.