"Ignorant" ? This is just my opinion.
I didn't play WH2 much at all really (no Vs at all to tell the truth, only against the comp), but that's the one thing I disliked the most about the game...
If this addition was welcome in the WH series, I guess they'd have kept it in WH2J and WHP... so I guess developers either took it off because they realized it was a bad idea, and/or because this feature was badly received by players, who complained about it.
It may be somehow fun to some, but I think it's frustrating and weird (as in, not "logical" in any way... not that this game is realistic, I know)...
I still respect the fact you enjoy it.
I like it better how, in other games, only a few characters can reverse projectiles using a special move. It looks and feels better, seems more "fair" to me, and doesn't happen as often.