She seems to have it all.
I'm really failing to see what weakness she has that can be exploited besides the typical "HUR DUR DODGE THE SKILLSHOTS".
Wînter Fox4 votesHer all in potential IS her escape. Make her blow her ult and she's useless damage wise and easy to catch.
Śovereign1 votesNevermind the fact her Q gives her some pretty good movement speed
Wînter Fox3 votesAgain - it's a trade off. Does she use her Q for damage or positioning?
OtterlyLost2 votesSame weakness as other carries; squishy and weak to CC. And until she finishes Morello, she's pretty mana hungry. She also gets dicked on by other assassins pretty hard. Ahri struggles against Zeds and Talons and Fizzes. And yasuo. But lots of ranged people struggle against Yasuo.
Dracocrash1 votes"untill she finishes morello"
nope. She needs a 900gold lost chapter and she will be fine.
Xavanic1 votesactually, shes a strong counter vs most assassins
His Dinoboy1 votes
are both good at locking her down, ahris weak against cc and is easily killed once stunned
bloodybadger11 votesslow burst. tanks in her face. easy to dodge second half of q. weak teamfighting if enemy team doesnt allow themselves to get hit by her aoe. low ms after using her ult (low base ms) (lemme check) so often needs to q behind to run/chase targets. (This is one of the reasons many high elo mid laners are getting 3% ms with quints-not just on ahri) e is mana hungry and long cd so if she misses you need to abuse. high mana costs for low cds so unexperienced might spam spells=abuse > often pushes lane as a result of poke (q). weak burst = cant 100-0 you with one spell rotation at 6 unless you tanking minions or tower (compared to a zed/veigar/etc). pre-6 highly susceptible to ganks. post-6 after she uses one ult charge to go aggro = gankable or at least get her flash
ModThe Djinn1 votesTwo of her four abilities are skillshots (one that requires two hits to deal full damage, one that hits just the first thing it contacts), and the other two have smart-targeting that may not actually hit the target you need it to hit. She HAS to burn mana and push the wave to access her sustain, her mobility is entirely gated into her ultimate, and her mana costs are decently high.
She is squishy and CC vulnerable (having no escapes save her ultimate), and is weak to mobile characters who can dive at her, especially is they can block/juke her E. She's also mid-range, meaning some mages can simply harass her at range.
She has a nice kit, certainly, but she definitely has weaknesses that you can exploit.
Mecha MaIphite1 votes
Omen461 votesi agree with everyone else actually XD. She seems to be good at both dps and burst making her effective at wrecking squishy units and continually dropping hp on tanks, although, if you want to be a tank against her, 
are good choices. If you want to stun burst her, well, you can find 80 different champs good at that. If her sustain REALLY does bug you, which is weird because it's still rather weak compared to other sustains, Don't forget your favorite and mine; 
. greivous wounds shouldn't be underestimated. (although with extended sustain options coming up i think it should be buffed.) I do actually recomend cho over everything else vs ahri, just because cho is very strong and easy right now.
DarkRitual1 votesShe's absurdly squishy. If you can dodge the charm and get up on her, she's dead (or if you can bait the charm for your jungler).