Possibly, then again I'd say he's in better physical condition to deal with playing PF than CV is and despite his injury problems in the past he played 78 this season and his only absence came through a hamstring strain.
Defensively yes, but there are two sides to the court. I've said it several times this year and will continue to say it, LRMAM/CV/Bogut is about as ideal of a frontcourt trio as you can get in terms of mix of offense/defense and overall skills. It's not going to happen in all likelihood, but to me once LRMAM becomes the starter at SF, you need a diverse offensive PF. But that might be three years off anyway, so who knows.
I don't think Luc is ready to play 82 games at PF, but I don't think there's any way he will even if he's our starter there. You look at the teams that he'd really struggle to matchup the PF physically - against Utah he'd guard Okur while Bogut would guard Boozer as he always does, against SA Bogut will guard Timmy as he always does and so on and against any team with an outstanding 3 he'll guard them anyway (Cle, LA, Bos, Ind etc). What he won't give you is a starting PF who is locked in to a certain role on the team and has the offense run through him on the block etc like Boozer or Brand gives you, but what he does give you is outstanding flexibility on the defensive end.
Well, assuming we don't draft another PF or trade for one (I think that is unlikely, but just hypothetical), LRMAM would have to start at PF. And you're right, we would need another body behind him besides Allen/Alexander/Elson, and that is where the numbers crunch salary-wise comes into play. In my opinion, if the Bucks are going to be a threat to do anything in the playoffs, LRMAM cannot be their starting PF. He needs to be the 6th man backup at SF and in some cases, PF.
If our starting lineup next season has the scoring power of Redd, RJ, Ramon and Bogut then we really don't need scoring from the 4, but I would at least like a solid big body to back him up. I could see them sticking with Elson/Allen and bringing in a guy like Hendrix who will cost nothing and has some upside, if he's got a head on his shoulders that is
I think that lineup should be good offensively, but I wouldn't say we don't need scoring from the 4.