All of that might be found on his new journey and as of now, it's already rumored that he already have another one to coach him but I don't think he will be given enough time because that same coach is also the coaches of Anthony Joshua, Charlo and Errol Spence. But I have no doubts that he can a learn a thing or two in this new coach because he also trained numerous champions already.
So it's going to be a repeat on Ryan Garcia as you have said, remember that he left Eddy Reynoso because he thinks that he is not giving him enough time, as Eddy had Canelo Alvarez that was his excused and so he parted ways and go to Joe Goosen.
So doesn't make sense to go to Derrick James then?
Anyhow, we wait if this marriage will work in the future, imagine Ryan becoming slick and improved his footwork with his new trainer. Because it seems that James is known to train black athletes so maybe he can improved Ryan a bit.
I would trust Reynoso and Canelo's words rather than the very talkative unproven Ryan Garcia. Reynoso has the time but he wants his precious time only for those that are fully devoted and follows his advice. The same with Canelo, he allowed some athletes like Oscar Valdez, Andy Ruiz, and Ryan Garcia to join his training camp but they need to train like hell and not bring negativity to the camp.
Derrick James was in my mind too but I did not mention it because the Charlos and Spence are very close friends of Tank. Spence seems cool but the Charlos might bully and laugh at Garcia if they are in the same camp. I can feel deep inside that Ryan is hurting and wants revenge because he was not given the chance to fight Tank at the weight class he wants. Maybe James can fly to the place where Ryan can establish his training camp but I am not sure if his ego is capable of surviving in the same training camp with the Charlos. There is even the chance of Tank visiting his friends in training.
Ryan won't become slick overnight but James can help him set up his punches properly and work on his defense. He really has the habit to become wide and open when he throws his power punch and Tank knew it.