If you asked Will I Am if he'd do something different in his career, he wouldn't change a damn thing. Black Eyed Peas were a mediocre Jurassic 5 type of lame group before they made the pop music transition and sold crazy amounts of records.
It's actually remarkable that such an unpopular rap group would end up having a crazy mainstream success for almost 10 years. Most of the mediocre rap artists who try selling out either fail right from the start or have like a couple year run at best.
Nobody's checking for BEP raps other than some try-hards or a very small group of fans who actually dig their early stuff.