You're allowed leighway on PG-13 with swearing. So it's hardly gonna be without any hard language, if needed of course.
As for Chuck. The guy has been retired from films pretty much. Even The Cutter came after a long while after his last feature film. That seemed to be simply for the paycheck. But yeah, his contradicary ideals are strange. Lets not start thinking he's called all the shots though. It's not an unreasonable request. If it was that important then Sly wouldn't have had him in it. But fans demanded Chuck, JC and a few others when casting the first film. I'm glad he's in it.
I'm not a fan of R rated directors cuts either. Sometimes the additions feel needless and for the sake of it. Sometimes the pressure from fans forces producers to backtrack for no good reason. Die Hard 4 was blatantly PG 13. From start to finish, all the way through production. Then the furore happened because of that. Then they tried to make out that it was an R, but the wanted to cut it at the least minute. BS.
Die Hard the directors cut did extend a few cuts for more violence quite well, but mostly to make the DVD an R, they re-dubbed in some swearing and added CGI blood. It didn't feel right, and actually the cutting in the PG 13 flowed better. Sometimes the added R language seemed misplaced too. For example:
PG-13: Bruce- "Hey Dickhead!"
R: Bruce- "Hey fuckhead!"
Now Bruce has always delivered the line Dickhead better than anyone, so actually, that pg-13 line worked. The dubbed in "fuckhead" felt off key. There was a lot like that in the Die Hard recut. So personally, after all that fuss, I still just prefered the flow of the pg-13 version.