I wonder how much of the idea to go Fractal was even James.
He seems pretty pragmatic about his amps. If it sounds good then generally stick with it. Marshall, Mesa, Diezel, Wizard over time. Anything else is usually only peripheral studio use in searching for that extra spice. He doesn't seem to be the kind to constantly tone search. I would bet apart from his Marshalls being stolen and him starting anew, he was mostly exposed to these different amps by friends or producers and he ended up bonding with them, rather than chasing endless avenues. Get a kick arse sound from an amp and just get on with writing songs and touring.
Did Fractal woo him and the team over into switching? He's a huge score for their brand for sure.
Their justification that it's more cost effective for touring doesn't wash for me either. How about taking one less of the fkn huge jumbo screens or reducing a small part of the elaborate stage to offset the cost of shipping a couple of extra containers of amp gear? It's not the pissy cost of shipping around some amp heads. If they were tight on money then the stages and screens wouldn't keep increasing each tour.
The reason people go to a concert is for the band and the music, that should be the priority, not the 6th 100ft screen or frikken black beach balls (wtf was with that shit anyway). Get the guys in best shape for performing and make them sound great, the rest of the show is just for girlfriends in the crowd.