And I'd like to add that my personal experience is that, because of this, players tend to not actually take those feats...
While I am one of the players who does take feats like Improved Trip or Improved Disarm, I am among the very few who do...
But then again, I have always been one to take a different path. In my career as M:TG player, I was an innovator, not a follower- I was among the first in D/FW to play a discard deck in tournament- but because of that, I didn't go deep in many tournaments and got labeled a "scrub."
In D20, that has meant that my Disarm/Tripping PC has sometimes been called "sub-optimal"...but he's been a blast for me to play. And nobody complains when the BBEG loses a key weapon or his balance due to my whip...
I think part of the problem is that players perceive the obvious path to building a fun PC, and that blinds them to other potential builds. They get trapped within conceptual boxes that prevent them from exploring the fringes of the game. I don't mean going for exotic, templated PCs, but rather building mainstream PCs in unusual ways.
Strength based monks generally rule in combat (as compared to other monk builds), but my Dex based monk with a polearm took full advantage of the Reach and AoO rules and did nearly as much damage in melee as the party's Barbarian...and was better at ranged combat besides.
Perhaps someone should write an article or a book about alternative builds & their effectiveness within their design niche. Builds that take advantage of or limit the effectiveness of AoOs might add to the typical game's texture.