I'm certainly on board with the idea that there should be a variety of ways to play the game, as in a variety of strategies and win conditions, not just champ variety.
I love the idea of situation/strategy specific items, and in fact I think cookie cutter and/or generalist builds are a very big problem with the game. While I think it's clear LOL is a better game than Dota2...I think one of the few things Dota does well is put proper emphasis on building the correct items for the situation and allowing teams to have vastly different goals within a game.
Yes fighting is exciting. But having only 1 way to win the game is boring AF. I'd love to see some item changes that actually noticeably buff hard split pushing or "gates" style play, or some items that make full poke or siege comps not extremely risky to play, also would love to see warding or some other vision mechanic added back in to early game jungling to revive control/support style jungling. I loved it when Ivern was a top tier pick, also loved it when Nunu was a top end jungle pick.