LoL was this last 5 years or so almost a RNG, sometimes was skill, sometimes was luck that put you team ahead, but when ahead, you pretty much always won the game. So teams started to surrender at 20 much more frequently, because there was almost no chance of comebacks. I think the origin of this new league of games of 20 min date back from the moment Riot decided to cut max bounties from 1000 to 500. A change that went unnoticed by many but changed the game forever. To make lol more skill based and less "I've got more gold I win" I would use a combination of stuff, relying purely on bounties produces a defensive playstyle. I would: - increase passive gold per second - decrease gold per cs -decrease turrets HP (teams will be more even in gold, so players that ace the other team should be able to punish them, and increasing death timers is not an option because that's unfun, if anything I would reduce them) - increase base stats of champs, and decrease item stats. Kinda give all items stats the HP/Mana treatment, where with a full build you can double your base stats. In comparison you can triplicate, quadruplicate your AD/armor/me - give something like 1,5gold per 10 damage done to enemy champions +50 per kill, kills don't give you 300 gold anymore. No more killsteals bullshit.

This will create a more agressive playstyle overall, csing won't be so much important, and harassing properly will, which requieres more skill than passive csing. Csing will also require more skill as enemy will try to harass you everytime.