Yes demomen players can ignore the current new weapons and just not get mad at all the melee stuff, but that doesn't stop them hurting about the potential a weapon update could have for a class that hasn't technically had a real weapon update ever.
Melee weapons are fun and all but i sympathise with demomen players when their only options are vanilla spamtasticman or useless dark knight.
To be fair, the Demoman is pretty bloody effective with his base weapons. He basically has two primary weapons that he can use at the same time. And by that token, he has four primary weapons to the Soldier's three (five:four if you count the useless jump weapons). There are only so many variations on the theme of "blow stuff up" you can do, and he had quite a bit of variation from day one. Any primary or secondary weapon that
doesn't blow shit up is going to be perceived as another deviation from the class or a nerf.
That being said, he does seem to have been singled out to get new weapons every time we turn around. He's tied with the Soldier and Scout for most unlockables, with five more than the Engie, four more than the Spy and Medic, and three more than everyone else. If there really is so little Valve can do with him, he should be on the lower end of things.
I blame the Contribute site. As soon as they put that up, they were pretty much committed to adding every new weapon someone with access to their school's copy of 3DSMAX whipped up, forever, no matter how much certain classes were favored over others.