Doing MSR, E3, RVV and P-R, followed by a Giro would be extremely difficult, especially if Jonas is there. Also, LBL seems like a free monument, I don't see why he wouldn't do it
In their calculations the weight is irrelevant because they use standard weight. However it is possible that he could climb a bit faster if he was at optimal weight
According to LR, he did 0,2 w/kg more this year in Lombardia compared to PdB on a 20 minute shorter climb, plus this is a 1 day race and that was stage 15 of the Tour. So no, I don't consider any climbing performance this year better than his PdB one