>>79196520Heatwave is functionally useless on his own because of Firestorm. Rory's just there because Snart is - they're a package deal, and frankly he lightens things up a bit.
Ronnie however is bland. He has no characterization outside of his love for Caitlyn. He doesn't even bounce off of Cisco and Wells with Techo-jargon the way Stein and Ray do.
He's also not a good foil for Stein as they're both exceptionally educated Scientists and Technicians. Their initial "drama" fell flat because, reasonably speaking, they would've gotten along much better than they did at first.
If anything, Jax is literally Comic Book Ronnie Raymond (which I feel was intended), he's a football jock (like Ronnie) who's not well versed in science and mathematics. His more mundane and hotheaded approach to the world is a perfect foil to Stein, who's more focused on the given tasks in front of him.
If anything, CW Ronnie is Jason Rusch (who also briefly appeared in the show), highly educated and reasonably competent - also useful without his powers.
Like I said before, Jax is LITERALLY the Original Comic version of Ronnie, down to everything except his appearance.
Ronnie is reappearing in Flash though - or atleast the Evil Earth-2 Version which is supposed to be Deathstorm. He probably either killed Stein during the accident which gave them their powers, or Stein himself is also somehow evil.