Hotfixes are good for the game. Please keep doing them.
It didn't take a genius to figure out that with 36% winrate that Fiora was pretty substantially underpowered. Being THAT BAD means Riot can really learn nothing from that 2 week patch, and won't have any information to go on other than "well I guess she needs buff." Now that she's clearly broken tier we can actually see competitive games with her and adjust accordingly. (Hint, too much scaling on her passive at later levels.)
It doesn't take a genius to figure out 60% winrate skarner doing his best imitation of a champion mower is broken as shit. With no real weaknesses, once again, there's nothing for Riot to really go on. All they can really do at this point is "nerf him." Then once he can actually lose some games Riot can figure out what his strengths and weaknesses are, other than "being banned."
With 43% winrate it once again doesn't take an idiot to see Darius is clearly basically a broken down champion right now. His Q does 60 less damage at level 9 despite also being substantially harder to hit, and his Q only evens off to old Q at level 18, when it has such a damn long channel that you can die within the channel because damage is so high at that stage of the game. His W does 30 less damage at level 18, and has 0.6 less AD ratio. His E never hits anything, ever. Also, he has no survivability, no attack speed slow, and is just free 300g against Vayne/Kalista now (who are their own balance nightmare, mind you.)
Mord got COMPLETELY changed and sits at a 47% winrate. No hotfix needed there, as even I have no clue what I'm supposed to do with that champion yet.
Garen has a 56% win rate and a 550 + 40% health execute true damage nuke MIGHT HAVE BEEN A BAD IDEA, RIOT. STOP ADDING %HP TRUE DAMAGE TO THE GAME, RIOT. STOP ADDING TRUE DAMAGE AT ALL. WHY DOES SYNDRA NEED TRUE DAMAGE? WHY DID GAREN NEED TRUE DAMAGE? STOP IT RIOT.
Also, Syndra is already one of the biggest issues to deal with for melee since she can ALWAYS freely combo them, and now you're giving her true damage? Why not fix her issues against RANGED opponents? All you're doing is making her better at what she already does good, which is not the reason she isn't picked. STOP ADDING TRUE DAMAGE. So much true damage and %HP damage is what lead to the tank meta in the first place. You add so much %HP damage and true damage and then tanks have to be OP as FUCK to get picked. The anyone WITHOUT %HP damage or true damage gets fucked, so you start adding more of it and next season we'll see another wave of tank buffs and it'll never end. It only ends when you stop adding %HP damage and true damage so tanks can stop being balanced against it.
POINT IS: Hotfixes good. Waiting till next patch gets you no good data. Data helps you balance a champion.