For example Dhalsim skill is levitating and his trigger is creating a bed of fire. Nash skill is absorbing projectiles and his trigger is a teleport (something other characters can do as special power, but that's not the main point). Mika gets the mic to empower her next grab and her trigger is summoning her tag partner...
Then you have characters where it makes more sense to relate their skill and their trigger, like FANG throwing non-stuning poison as a skill and creating a poison cloud as a trigger or Zangief's trigger being a better version of his skill.
The more offense oriented Dhalsim gets even more maneuverability. Giving a character with neutral dominating tools the power to coat an area of the ground in a DoT is very fitting. Gives some more damage potential and some way to be threatening besides teleporting on knockdown.
Nash imo just has a bunch of tools he can throw at you and try to control the match. His teleport functions differently than Dhalsim (locations) and he is a much faster character. According to Daigo, Nash's V-trigger makes him play ryu as if he didn't have fireball. More fireballs thrown, means more easy V-trigger for Nash, means more teleport shenanigans to either use as an escape (his only other good reversal tool costing meter) or as a mixup (which compliments his sonic boom speeds).
It's like complaining about Ryu being able to throw a fireball when he doesn't do anything else energy wise. It's just a tool the comepletes the game style package that is Ryu. So I think you should just look at it all together instead of dissecting each V-skill/trigger independently.
Sure some of them are harder to use (Mika) or seemingly useless when trying to get V-trigger (chun). But so far I think it's balancing out because both those characters have very powerful V-triggers. The system could probably be a bit better, but I think it does of good job refreshing the whole cast while still keeping everything rooted in tradition.
