The new pathing seems pretty bad, I already noticed two weird ass issues yesterday.
1) Radiant trees by the old easy camp (aka closest camp to radiant mid). If you are on one side of these trees and click to path to the other, if there is a hero ANYWHERE near the other side, it will usually path you halfway through the trees, then turn you around, maybe path you around the trees but more likely back through the trees because the other hero moved an inch, and then back out. This is all with the other hero nowhere near blocking the little tree pathway, but the game reads it like they are. That one spot is fucking horrible.
2) I encountered a really weird pathing bug with Drow when orb walking a Tide. Every so often, my hero would do that weird ass slow down/vibrate (in the middle of the lane) thing that happens when you try to circle chase a hero around a tower--you're hero starts to twitch and your MS slows the hell down--I know everyone has lost kills this way when trying to tower dive and playing ring around the rosy with the other hero. But anyway, so you learn to never circle around a tower, but this shit just happened in the middle of a goddam lane.
I'm sure there are other weird spots like the first, but seems like the new pathing has introduced a few very glaring issues.