Some other Heavy topics:
On GRU: They have to be pulled out to move faster, which requires a bunch of time, and you still move slower than the 100% speed classes (sniper/engineer/spy/pyro). The GRU is not for pursuit - it is for covering the long distance from spawn to fighting quicker, and for covering some other shorter distances a little quicker, but its use in the middle of combat is somewhat limited honestly. It is good, but it is not the cure-all for heavy's slow speed that some are suggesting. Also, you cannot use both this and the Fists of Steel.
On Fists of Steel: You have to have them out to be protecting yourself from ranged attacks - same thing as the GRU applies, weapon switching means even longer before you can react to a threat. You can be defending yourself with them, or you can be shooting, but not both at once. It helps somewhat against snipers, but an experienced heavy just knows what areas to not stand in in the first place anyway. Also, when you have the FoS out, you are almost instantly murdered by any melee attack thrown your way. Also, they cannot be used with the GRU. So it's one or the other. Heavy can't cover all his glaring weaknesses at once.
On the learning curve: Yeah, again, when people are dumb and run into your line of fire without a care in the world, heavy's friggin' easy. I will admit that heavy has a higher floor than other classes - someone picking up heavy for the first time is going to be more effective than other classes. But I would assume that people don't stay s*** at the game forever, and when you actually need to get skilled with heavy it's not that easy. You have to learn to compensate for his incredible slowness, his inability to react quickly to unexpected threats, his weapon's inability to get past cover, and his inability to retreat once committed to a battle. You have to learn things like the best places to position yourself for offense and defense, watching the state of battle and knowing when to commit to a fight and when to stay away, things like that. Just because it doesn't require twitch aiming and jumping around doesn't mean it's easy to play.
On the fact that people are s*** at this game: Well yeah, maybe they should stop being stupid and running right into the heavy like idiots. Yes, I am suggesting that. Nerf heavy and he becomes worthless against people who are good, and that's no good either.
On being able to run away from heavy just about 100% of the time: Yes, it's true! Heavy is f***ing slow and cannot chase you! I would not lie. If you find this to be untrue, one of two things happened: you pushed up too far and walked into heavy's territory, which is your fault, or you ran around a blind corner and got surprised, which does happen, but it's just as bad to get surprised by a soldier or a demoman or even a scout or pyro. You're going to die either way if you're not aware of the situation. It happens sometimes.
On the Tomislav: It might be a little broken, yeah. I'll concede on this. Still, not as bad as before it was nerfed. That was really bad.
On stabbing heavies: Yes, it works, and it's terribly frustrating. Just don't cloak right behind me, I listen for that.
On the minimal effort for maximum input of Heavy in pubs: Demoman's easier. Heavy is my most played, Demoman is my least played. Demoman is still easier. You think people are bad about walking into heavy's line of fire? Try watching people run blindly into sticky traps. You'll be amazed.