LIst of easily implementable temporary fixes

Yorick:

• make Ghouls more clickable for counterplay
• mana regen buffs

Akali:

• revert the unintentional R missile speed nerf
• make Q travel faster than R

Aatrox:

• make him invulnerable in the rising part of his Q

DoT mages:

• give a 2,5 seconds cooldown to Deathfire Touch, so DoTs apply it one or at worst twice.

ChoGath

• move a small part of his Q casting time into the delay part, leaving him able to move
• fix his W like Darius's E

Evelynn:

• allow her to use W without breaking stealth

Fiddlesticks:

• slow exponentially feared targets so as that they don't leave W range
• improve his autoattack frame so as to put a quick runeglaive proc in between Ws in jungling

Fizz:

• make trollpole not CDRable
• check if strikethrough is possible, if not just do a normal targeted dash instead

Illaoi:

• put the HP bar for tentacles above the hitbox, consistenly with everything else in the game

Irelia:

• nerf her ult by a lot and have it deal a lot of bonus damage to minions, so she's a stickiy duelist and doesn't have a Riven-like finisher on top of it (yes, I know it doesn't have an execute, but she usually uses it to finish off people who managed to kite correctly)

Janna:

• buff her W range to feel less clunky, she got nerfed in her tower defense recently

Hecarim:

• give him back his unit collision ignorance :D
• have his Q deal much less damage if it hits minions (restriction reduced at lvl 5 and 10 and removed at 15)

Kalista:

• cap E at like 8, double cap on champions
• remove vision ability, make W just a passive
• revert autoattack AD scaling so she can buy crit items (literally everything except Botrk today) and not double the loss

Lee Sin:

• swap a few abilities to total AD
• add bonus damage to monsters on E so as to make him remain a solid early jungler
• remove second cast on E, just mark targets and prevent use of dashes for 1,5 + 0,25/rank seconds
• change E true sight to normal vision + sweeper's scansion (but in orange instead of red)

Leona:

• if no ally champions are around, she can proc her passive for 60% damage

Lucian:

• actually give him his ult's bugged bonus damage to minons, Rote pls, although it looks like he's doing very fine

Malzahar, Swain:

• improve autoattack frames

Mordekaiser:

• give access to reduced healing to solokaiser, he's still the only health cost champion in the game without built-in ways to sustain
• make Q buff duration slightly longer
• remove EXP passive
• +5 ms

Nasus:

• slightly lower ult cooldown early on to deal with constantly engaging low ult cooldown duelists

Miss Fortune... not really sure, this one's quite debatable:

• show enemies (and MF) indicator of when a minion killing Q bounce will kill them
• revert PBE E slow nerf

Nunu:

• improve attack frame and speed up Q animation to make it easier to use Targon lategame for support Nunu
• change passive tooltip to reflect "new" (s5!) jungle monster names, and PLEASE do a different one for each map
• on Howling abyss and Crystal scar give different bonuses based on type of lane minion

Pantheon:

• make his jump grant true sight of the stunned target

Quinn:

• make ult less clunky and numbers less overtuned
• specifically, stop minion interruption, minion slow, and post lvl 16 stop turret damage interruption
• prevent heavy bruiser Quinn to 3shot carries like a full damage Leblanc

Rengar:

• give us our goodamn pink trinket back.

Singed:

• make his poison start eve so slightly more ahead relative to his hitbox

Sion:

• some scaling mana regen buffs would be nice, the undead zombie big dude who can't hit things with his axebecause he's out of majix is sad.

Sivir:

• change passive to %arpen based on number of nearby allies

Sona:

• stronger W and E powerchords

Soraka:

• buff Q missile speed to match the pre-range nerf value (rank has been reduced but max rank speed kept the same while Q speed was already what made her feel clunky since the rework)

Tahm Kench

• reduce damage to grey health conversion OR have shield decay over 4 seconds instead of 6

Talon:

• change blink to very fast dash, target centered instead of target locked (so that you can flash away)
• buff all damages

Urgot:

• add bonus HP scaling on W
• make E quicker OR more damaging OR longer range but with landing indicator à la Corki

Veigar:

• revert any of the s5 buffs. Just not the W casting time one.

Yasuo:

• less shoving at lvl 1: less E damage to minions, lower Q cooldown
• armorpen only on ultimate, but buffed to 65%, so that if the enemy team lets Yasuo's set up the knockup, they lose the teamfiht, BUT it it's failed Yasuo doesn't have tons of invisible power afterwards

Thornmail:

• bonus armor scaling from 25% to 20%

Botrk:

• attack speed from 40% to 50%, so it becomes THE item for Sated, critless autoattackers and stuff

Dead Man's plate:

• second passive: melee only only activated above 120 bonus armor+MR
• first passive: only activated above 120 bonus armor + MR
• why? To allow defensive ranged counterpicks, and to give a role to Sunfire aka rush armor item, since it doesn't require pregress tankiness