I would hate to give up on Rudy. Dude just needs to brush off his national team for an off-season and really work on catching the basketball and finishing strong. Whenever he jumps to go finish, it seems like he never has his body under him and he just flails towards the rim.
Guys need to chill... some of the difficults Rudy is having are a bit like hitting the rookie wall for a top pick : he spent a year and half not playing that much and has been playing 35 mins a night since february and had a summer chock full with his national team. He is still a defensive force but team have adjusted to him and his offensive shortcomings are being exposed (a lack of moves and strength).
Patience and being methodical are key.