Some suggestions:
1) Bring your elbows up a bit so they are slightly in front of the bar.
2) Tilt your head up slightly. This will help you keep your chest proud and shoulders from slouching.
3) Squeeze your quads and abs tighter.
4) Start the hip reach from neutral and send your hips forward (don't pull your hips backwards to initiate).
5) Reach your hips forward much more aggressively.