On the surface, one might think that stealing ideas from the Attitude Era would be a good idea. However, I'm not really sure that would help TNA at this point. TNA is already accused of trying to rehash WCW and WWE wrestlers, ideas, storylines and stunts and they're heavily criticized for it. Ripping off ideas that the WWE used 10-13 years back isn't really going to do anything to make TNA appear to be anymore innovative and original than they look right now.
Also, in spite of the smokescreen TNA and Spike puts out, I don't think they're really all that interested in pushing the envelope or they're not really able to. I think Lariat mentioned having RVD light one up in the middle of the ring. It'd be an interesting stunt, but I don't think it would do TNA any favors in the long run. Aside from potential fines Spike and TNA could face from the FCC, something tells me that the Carters aren't going to allow even simulated drug use on their television show. If they won't show Orlando Jordan kissing another man, they won't show RVD lightin' up a doobie. Besides, TNA has pulled cheap stunts like having the Knockouts mud wrestle, Lacey Von Erich do a strip tease in the center of the ring and a few other things that have not only not helped TNA, but were bashed as terrible segments by fans.
Personally, I think what TNA actually needs is to find its own identity. Maybe, at one time, TNA had its own individual identity but, if it did, those days are long gone. Taking bits and pieces of what WCW and WWE have done and done much better in an attempt to piggyback off the success those companies had hasn't done all that much to help TNA at this point.