I must have watched the whole series 10 times by now and I still have a hard time with Sheridan using the modified telepaths as weapons. That's just not something a person does! Use living people as weapons?!?!? I'm sorry but that's a war-crime right there; win or lose.
But Sheridan had already changed by then. His boyish charm of the first season was long gone.
It seems pretty clear that after Sheridan "fell" at Zha Ha Dum, included in Lorien's process of letting go of other's expectations and living true to yourself, included in that process was the birth (rebirth?) of a new Sheridan, very different from the one who arrived in season 2, even very different from the one who chose to fly to Zha Ha Dum.
Prior to his death Sheridan seemed to embody the caring, consciencious leader who was, to quote Garibaldi describing Londo, holding on to the tale of a tiger (if for no other reason than to avoid getting eaten), in reference to being thrust into command of all the nonsense of big ol B5, thrust into the middle of a war of ancients, he pretty much was just doing what he could to keep things together, to give everyone a chance to survive. And no so much taking charge and initiating events, so much as reacting to them or acting so as to avoid them.
After he was reborn and returned from Zha Ha Dum he was, IMHO, not nearly the same person, and not because he had died and come back arrogant for having survived, and not because he was hardened by losing some of himself upon dying,
but rather because he was a far more streamlined personality now, having discarded all the "extra" stuff humans carry around to get in the way of what would otherwise be simple choices, he was not more arrogant, and not harder, just clearer in his mind and free of the fears and weights that an supposed untimely death can saddle us with.
I would say he was merely more focused, more clear headed and directed of will, more prepared to do the hard things
(like sending 10s of unconsenting telepaths in to save hundreds on both sides (most arrogant people are not as concerned with loses on the "other" side of a battle)
as decisively as most people would be in doing the easy things in life.
Just a shot in the dark, IMHO.