Well it seems that you decided to give them a try so I won't try to stop you here. But I would point a few things before you throw the wilders at your players.
Ok, madness for everybody is a good idea. The actual system makes the male wilders at best annoying to play compared to their female conterpart.
You should remove the overchanneling. DD3 was not created to support casters PC able to cast a nearly infinite amount of 3rd lv spells. It's not a problem in WoT, but it is when spells like a 10d6 fireball are 3rd lv in DD3. On the other hand, madness for everybody and the risk of loosing all spellcasting abilities may force your players to think twice before abusing overchanneling. But I can garantee you that you'll see this ability abused anyway.
The spell table is unusable as in the WoTCS. No class in DD3 should be able to cast 5th lv spells at 7th level and 3rd lv spells at 4th level (or something like that, I don't have my book at hand for now, but it must be very close). A lot of prestige classes and all the monster CR are calculated with this fact in mind.
Well of course this is only my point of view about this class in DD3, just my 2cp so you can throw ugly things at me if you want (but please not stingy or sharp things, I prefer people who throw at me some food, OH YES THROW ME SOME FOOD, I DESERVE IT, PLEASE BE CRUEL, NO PITY HERE -preferably meat, I'm not to addict to vegetables-

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Err.... well anyway don't forget to carrefully close all your windows if you have any wizard players or else they may decide to jump thru once they see the almighty firepower of the wilders
