One more thing...
If, in current lore, Picard took command of the Enterprise-D at the age of 59 y/o, I wonder if Picard, in this "what if" scenario commanded a Constitution-class (pre-refit), a Constitution-class (refit), a Miranda-class or some other class of Federation starship, before assuming command of the Enterprise-B? The only thing that I could find that would be comparable would be the USS Constellation NCC-1017, but that was under the command of Commodore Decker (TOS: "Doomsday Machine"). Maybe Picard would take command over the refit version? Or, in this alt-scenario, it was Picard who lost the ship while stopping the Doomsday Machine (instead of Kirk). Hmmm...