May I paraphrase: "Kids these days! Arr! Get offa ma lawn!"
If you look at the things getting labeled unfun, I think you will notice a trend. The things being described as "unfun" tend to involve 1) a lot of bookkeeping for an in game effect of minor importance, 2) "losing" for reasons outside of the players control, or 3) disputes between players and DMs regarding control of the setting.
Regarding 1) if I have a magical quiver that can hold 300 non magical arrows, and it takes me 100 rounds of shooting at full capacity to use up those non magical arrows, and if it costs me a trivially small amount of gold relative to my wealth to replenish those arrows, then why SHOULD I keep track of them? Doesn't this remind you of magical components? Sure, an element of realism is added, but an element of realism would also be added by making wizards count out how many units of bat guano they are carrying, and we don't do that. Should we? Would it be fun counting out all the different magical components a wizard might hypothetically need, making a list, and marking down each time he uses one?
Regarding 2) it really isn't that fun to lose for reasons outside of your control. Even if its realistic. I suspect you agree, but you changed that complaint in your mind from "its unfun to die due to a random saving throw" into "its unfun to die! Waaaah!"
Regarding 3) this is an eternal fight between DMs and players for control of the game. I'm sure you feel it is "unfun" for a DM to be forced to permit warforged or monks in a campaign world he designed. You should then recognize that its unfun for a player to be told he can't play a warforged monk character he designed. Considering that this issue is not going to be decided by the rules of the 4th ed, I'm not sure why you brought it up. Every gaming group has to come to a balance between the DMs desire to run the game he wants, and the players desire to play the game they want. They reach this equilibrium by considering things like friendship ties within the group, strength of preference, and the availability of alternate games. This has nothing to do with instant gratification, it has to do with your preference for DMs over players. There is no objective answer to the question, "is it better for a DM to make an exception and allow one warforged character in his campaign world, perhaps by writing a unique creation story for him, or is it better for the player to find something else he'd like to play?"