Kamensky back in his day was immensely talented, and also had a wicked shot. Not a heavy one, but a nasty and accurate wrister. He wasn't a sniper, but was a great skills guy and distributor of the puck (better than Kovalev).
He could see the play develop and make it happen on a par with (or better than, at that time) Forsberg - remember that he grew up learning and playing in a Russian system that was the world's best.
He was a good skater - quick but not with great top-end speed. I've a strong feeling he was an even better skater before he got to the Avs.
He wasn't a guy to put on the boards down low to protect the puck or parked in front of the net, since he wasn't particularly strong. He worked best in space and dishing to his linemates - Lemieux (never afraid to take a shot) and Forsberg (who seemed to take nifty passes and want to make even niftier ones back).
The book on him from an opponents perspective was to hit him hard, early, and often and you wouldn't see him below the faceoff circles for the rest of the game (i.e. he wasn't a big fan of contact). He wasn't the most formidable back-checker, though knew where to be on the ice in his own zone and was reasonably responsible.