Yarp. Whilst we judge other classes by the sum of their total, Sunbreakers only get judged by their super. Nevermind the fact that Stormtrance has the best melees and grenades with an extremely strong Super that gives them blink+armor+constant DPS, or that Nightstalkers have alot of utility in terms of their map/dodge roll/area of denial grenades/versatile smoke grenades that can be used defensively or offensively.
Sunbreakers meanwhile have armor(Like a titan should), some lackluster grenades(Best pvp one being the sticky. They have area of denial, but unlike the Nightstalker it's not constant fire.) They heal when killing someone with fire which synergizes, but otherwise as a class they're lackluster until the Super is brought into discussion.
Makes sense they have a strong super but are lackluster elsewhere.
People complaining about the overshield have no idea how it works. "Oh Sunbros get overshields and they can move and nuke anything!". Except Titans only get an overshield if they're standing in their fire, making them immobile. "Oh but a titan can hammer ahead and create sunspots!" And what? Not throw a hammer at an enemy? Be restricted to where the sunspots are?
It's like....funny.