DO NOT remove minion block.
Modify it.
It should be restrictive in order to change the dynamic of range/melee match-ups, or even lane bullies (who often rely on auto attacks). Aggro range should be longer, and minion speed increased. Meanwhile, collision radius on minions should be slightly reduced. You could even increase minion damage early on.
The reason I say this is because, in other MOBAs, harassing is a lot more restrictive early on. Attacks are slower, movement is slower, etc early on, making minions more of a threat, in addition to minions having generally higher speed/damage. In addition, League has manaless champions, and mana costs on the majority of strong champions are not very restrictive to start with...
Creep block is supposed to be a tool for both sides (restricting aggression while you're under tower on both sides). Not an incentive to do jack shit if you're losing because of how messed up it is, like in LoL.