The fact that Zak wanted to nerf a couple parts of the Tech & Gunner, but nothing of the Ranger, leads me to believe he likes to play as the Ranger.
I play gunner (did you even look at my icon and sig?) and tech and I think I play ranger once a month for the heck of it.
The shotgun is out of control on the pubs as is gas grenades. The problem with the shotgun is two fold ... 1) The range is insane. I have actually sniped people with my shotgun where I should of been forced to switch to the machinegun. 2) The alt-fire can one shot gunners ... which is ridiculous considering how easy a target gunner are in comparison to other classes.
Gas Grenades cover way too much area and last too long for the gi-hugic amounts of damage they do ... esp considering that they completely bypass shields and thus affect the supposedly rugged (but SLOW) gunners just as badly as techs/rangers.
Everything else you were way off on.
I mentioned lockon rockets because they are TO HARD to lock onto a target for how easy they are for that target to avoid. Against skilled players, lock on rockets are a joke.
I mentioned the duration of the alt-fire Flamethrower because it doesn't last long enough for practical use. A Gunner should be allowed to put down X units of the alt fire and it should last until touched by a player (enemy or friendly). Placing more units down when you are at your limit will destroy already placed units in the order that you placed them.
I didn't mention ranger because I don't know much about the class from lack of playing it. I don't like to talk about issues that I don't fully understand.
Any long time players knows exactly where I am coming from, especially since most of these issues were brought up by the beta team before release, but never had a chance to be addressed due to schedule / legend being canned.