actually, that vizard mask only make him attack while blinking around, not stronger. seems strong because ichigo are fast, strong and keep avoiding attack on that mode. bankai increase attack speed and power, the one actually matter about being uber powerful. bankai + vizard = win.
um.. but byakuya's bankai, the one that make him stronger doesn't actually exist.
kimimaro: do you remember his spear, the ultimate offense? i think that was supposed to be that skill.
Shiki tohno: actually, shiki do not exactly have any ability other than can cut 'death lines" or 'points' using sharp things. it erases existence of the object, or living things, cause it to die as side effect. so, most of the skills are thought up according to that. which is really gay and have small cool down time. >_>
neji: i agree with this though. i am thinking about neji's ability to emit chakra is the reason for this skill, but still doubtful.
tell you what? i dont think map creator really care about it much. they focus more on building the game.
i want to add some thing. instead of hero didnt use original abilities, i would say, some hero should have more abilities.
if only kisame can use his water prison just like in anime, that would be balancing more for his slowness. Don't you think it's better if those ninja actually can use ninja skill like kawarimi no jutsu? not really fair when bleach heroes have flash step.