Metagame for Dota 2 is more focused around the hero flavor of the month rather than the optimal lane setup since you can run so many possible lane combinations it's mind boggling trying to pin down everything to a boring cookie cutter layout.
Right now Batrider, Undying, Nyx, Naix, Kotl, Lone Druid and Dark Seer are the big things in the scene. Some of them aren't even getting through the ban phases anymore due to how dominant they are in the game.
I'm no League player but from what I'm guessing champions picked in ranked games don't change a whole lot unless there are some big buffs/nerfs being thrown around. On the other hand with the unorthodox lane possibilities people are always finding new ways to mix and match wombo combos for whatever they get to work against the current best. The best example for this was when Anti-Mage was nearly unstoppable until people started picking the most unlikely of competitive heroes like Riki, the guy most infamous for stomping unbearably hard in the lowest brackets. Either that or pick someone who carries harder and hope to ride it out like Faceless Void. Where you lane them doesn't matter, but how you make the most of your team composition does. Metagame should really be labeling something more dynamic than where people are on the map since those only last for so long until everyone is moving around constantly, while people are going to be drafting the same type of lineups more frequently for certain time periods.
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