After playing it last night and this afternoon, I've got the hang of the game so far. The BETA has only two playable maps and you can max out at rank 14, along with unlocking a few weapons/attachments and the useful stuff you expect in a FPS game. The titans that you can call in (which anyone can get) are not overly powered, you can acquire your titan faster by racking up kills. Titans can be rodeo'd which you can them use your primary weapon to destroy it's power cell, doing so alerts the pilot who can hop out and smoke you. If your titan becomes damaged enough, you have the option to eject out. From what the BETA showed you have three class types to choose from; Assault, Assassin and CQB personally I play Assassin the pistol you get as a primary can auto lock onto enemy targets as-well as lock onto multiple targets which can bring you quad kills in a split second. The free-running/wall-running aspect just makes playing more interesting as you can virtually get onto anything in the map, it's a great way to move around un-seen and very under-used from what I've saw people still play this as if it were Call of Duty.
The only thing that is annoying is that you play against bots and real people, you'll find yourself killing more bots than anything because their AI is so dumb you can go around breaking their necks when there is five of them bunched together. If Respawn upped the real player limit from six it'd be a more competitive experience, right now it's piss easy to play. I might buy the full game come March I do enjoy playing it, something refreshing from the usual military shooters.