One thing they couldn't do against Cleveland/Boston last year was find a way into the paint and make the defence collapse on them. AI's dribble penetration is as good as anyone in the League's and his drives will free up a lot of top tier shooters like Tayshaun and Rip.
Iverson can also create shots for himself and force reactions from a defence, something which the Pistons lacked huge last year and the Pistons are the type of team defensively who can hide a lot of his flaws as well. He'll also bring a huge amount of desire, energy and attitude to a franchise which has looked stale and complacent for a long time.
Is he the answer to their problems and will he get them over the hump? I don't know or think so unless the Celtics implode at some point this season, but I definitely think it will improve them and was a risk worth taking from Dumars perspective. Iverson in a big market again must be a dream for the NBA too.
I also think it helps Denver more and opens up a lot of avenues to build a contending team but that post would enter essay territory so I might just let that lie