I realize it changes a DRASTIC amount of things in Brawl. Among those changes is new approaches, directional air dodging -- which is excellent -- also works wonders for grabbing items in mid air, wave landing, triangle jumping, run cancel, fake outs, wave dashing in general, more mobility, attacks out of wavedashing-- creating a slew of creative options for EVERY character. In addition the WD distance is relatively the same for every character, if anything it was stupid how it wasn't like this in Melee, overall, WD is far more balanced across the board in Brawl.
In addition to all of these EXCELLENT changes is the fact that the aerial game is much more intense now, as there's a much higher level of punishment to be rewarded for forcing an enemy into ADing too early, then attacking him. The aerial pressure game actually exists, unlike with BAD. Another huge aspect of MAD is the fact that it inherently adds more options for mind games, as fake outs can be pulled off, run canceling can be executed, etc. It's stunning really.
Seriously, WDing in Brawl is better than BAD in every conceivable way... Seriously, I can't fathom how one would reject all of the things I listed that it provides. It makes for a MUCH DEEPER game, and there's really no arguing that because it's true. Kupo, if I could pay you to use MAD for a month straight I would--- perhaps then you would realize how amazing it is in Brawl.
The addition of shield stun will NOT add as much gameplay depth that MAD has, there's simply no way... There's a whole slew of things as I've already mentioned that MAD provides.