It looks relatively fast, if it can get over, or around wreckage, fast, it would make for a very useful fast response urban combat system. The main arm cannon might not be able to take out a much heaver mech in one shot. (Barring a cockpit shot), but with sufficient backup, might be able to do so. Of course, against any non mech urban threat, this design would be very useful, the fully articulated arm and hand could be useful in things other then straight combat.
Now that is how the Sentinel should look. I think this redesign might make me actually like this mech now. I especially like the center torso and cockpit/canopy. It has the look that is should, that of an armored fighting machine, something that seems lost on some mech designs.