may have wave clear but he gets his in three abilities around the time annie gets hers from one and while you may think she needs 400 ap to one shot i can tell you from experience with and against the champion that,that particular comment is a load of shit. even if not annie has a point and click spell and an instant cast cone both of which can be used without losing mana for a full combo that will drop him far below 75% and you can try to be one of the general "he out ranges her so he can kill her" morons or you can realize she gets the single best form of cc on all of her abilities when ever she wants.
yes ziggs out ranges those champions but neither are what he actually has to out range and both do enough damage to kill him on one go where are zigg's kill combo requires quiet a bit of prep and timing(as in when to try so they don't just get out free) neither orianna nor azir do and both will easily drop him should they get the chance.
ziggs can siege better but since malzahar is cancer in lane who shuts down nearly everyone who isn't unlucky enough to have a jungler who doesn't know how to play his siege doesn't mean anything when he is useless and ziggs doesn't have better team fight then malzahar since malzahar will just remove the fed champion from the fight until either his target dies or they burn CC on him. ziggs however will die the moment a real fight starts.
It doesn't matter who they destroy the fact assassins make him useless is a big factor why he is crap since the champion himself is great but the meta is horrible for him.
Ahri is not overpowered... have not seen an ahri who doesn't feed except me on occasion and like 4 other people those matchs are like 1/100
morgana has to hit a Q yeah but since its on like a 6 second cooldown you have to dodge them damn near rapid fire and all it takes is one to kill someone and win a fight.
Lissandra is still in a better spot then Ziggs