They aren't all that bad.
Anivia has really high CC and damage. She does have a hard time playing against Yasuos and Zeds but she has a lot of disengage potential; and her passive is crazy.
Galio = Tanknivia. Same ability difficulties.
Garen's kit is pretty weird. For a tank, he has an awful lot of damage abilities. Crit Garen has a lot of damage.
I love and hate critplank. Over the years I've appreciated critplank's existence. There's just something to the character that's funny or appealing. I really wouldn't want Critplank to go. That's saying something, considering that I've never played Gangplank and do not own him.
I think the point of Lux is to utilize her AA between ability casts, which is why she has strong mana costs. I don't think she deals low damage at all. If anything, Lux is a standard Mage that does as much damage as LeBlanc with the same items.
I can't wait for Yorick rework.
Xerath is really difficult to pull off against current mid laners (Yasuo, Zed). You pretty much need to land every stun/slow to survive a lane against a good Assassin. However, he can't cross walls like Ziggs can. They are quite different.
Which is why good Udyrs build Swiftness, Zephyr, Tri, and every tank item available to be slippery and tanky at the same time. Udyr is simply a stun bot for his team, as well as the objectives man.
Singed is the most annoying top laner to lane against. I find that it doesn't matter how many times you kill him, he will still get beefy, tanky, and dangerous with his CC. You can't chase him, but if you do kill him he'd already have a significant cs lead. Proxy Singed is not something that I've come to appreciate like critplank.
I really feel like
should have been mentioned here. He's the weakest of all immobile mages right now. His delayed silence doesn't stop Zeds and Yasuos in their tracks. His only other CC is his ultimate that's easily counterable with
and
almost the same cooldowns as his ult. His combo is hard to 100% land (W+E+R) because everyone dashes around or flashes around.
Most annoying of all, his ult has a delay. An easy
charm destroys it.