Lanefan
Victoria Rules
May or may not have been the plan but the proof lay in the pudding. I wish I could remember the exact words he used but at a GenCon 2009 seminar promoting 4e, one of the WotC types (I forget if it was a designer or merketer, they might have had both there) - while walking in and before even taking his chair - started with loud and clear words along the lines of "Every D&D game you've played up to now is crap. Once you've played this D&D, you'll see what we mean".I'm not saying that's unfair, but I also don't think that was the marketing plan.
He and two others then spent the next hour coming back to different variants on this theme in between introducing/explaining aspects and elements of 4e to us. It was an uphill fight, however, as they'd lost half the room with that opening line.
Designed to exclude? Probably not. The marketing, however, presented a different message - as noted above.Trying to do something different and interesting isn't the same as exclusionary. The fact that people felt that way is something else. The fact that they felt that way doesn't mean that was the intent, however. "I feel like the game excluded my tastes and preferences therefor it was designed to do so" isn't a valid argument. I'm not denying that people didn't like 4E, I didn't like it much either, but I wouldn't dream of trying to say that 4E was designed to exclude my gaming tastes.

