IGN's gameplay of the Sentinel Titan.
The pivotal moment comes just under 4 minutes when Captain America's shield comes out and strikes down all 4 guardians. It feels a little like a Bladerunner but that maybe because it was near the guardians so he could charge up and shoulder smash them down.
The deployable shields do create much more of tactical play I reckon. The type of shield, the angle, the positioning between two structures. All in all start to get you thinking PvP will be a lot more fun, providing you have a 4-guardian team that has a bit about them.
Oh, and I didn't realise until the Sentinel super that it was 4v4. Still seemed busy enough so must be close quarter maps.