TF Teleport was not an ult.

Tryndamere used to get 8 seconds of ult.

Stacking sunfires were a legit build.
Eve stuns when stealthed.
Heimer was able to summon 3 turrets and his grenade damaged towers.

No champions had a "storage" system for spells like now, for example, Heimer's turret had a cooldown every time after you placed one down.

Malady used to give life steal and attack speed

Heimerdinger's turrets would attack Anivia if Anivia used her wall on the turrets.

And they'd kill Anivia.

ADCs played mid. This was still going when Vayne was released.

Garen being 1.3k...or...even more... pretty sure it was 1,300 BUT DEFINITELY NOT 450.

Spin to win garen sunfire stacks

Gangplank's Passive used to apply to his Parrrrely. A full page of crit runes with a pair of brawlers gloves meant you could 1-2 shot the first person to come into range.

This patch was reverted within almost immediately after release

xin release, I miss the old days ..