It is an open world alright. But when you enter a room and you got these ledges and everything to go to, everything just leads one way either way. Like a maze who every now and then gets to a crossroad.
When you enter a big room from the top, you go the acrobatic way (the only way.
) through, jump wall from wall, run on walls, etc. You've ran around the room almost completely just to get to the door to whatever lies ahead.
I'm not saying it's bad, it's still great, but that is just something I've noticed.