Mode Suggestion: 1vAI Practice
While I know this is just going to be seen as a ripoff of the mode in DotA 2, I feel its something League could desperately use. Right now League does not have an effective way to practice things like last hitting, champion skills etc. that doesn't involve playing with other people or trying some contrived method in Custom Games. It could greatly benefit from a practice mode. Something like this;
1v1AI on Howling Abyss
AI Difficulty is chosen and be set to Beginner, Intermediate, Doom, Doom II, Doom III, Doom IV AI uses Random Champion suited to fighting your champion's most common intended role (IE: Mage vs. Mage, ADC vs. ADC, Top vs. Top etc.) Game ends when side dies gets 5 kills, 150CS or destroys both towers Small IP reward (IE: 5-10 per win), not affected by First Win Bonus
The point of this mode would be so that players can have an area to practice with champions where they aren't affecting other people, can do it in a setting at their pace and actually have an opponent of some kind resisting them.
Just something to consider.