It's a pity you cant soften the front bar that would be a good start after checking tyre pressures, How low is the front end, top of the guard inside to the deck? What are the spring rates? In the end it looks like a few things and I guess the diff isn't helping. I'd talk with the guys in the NSW section to get a referral to a good suspension shop...Heasmans or similar.
This is why I get my tuner to go the mechanical and a specialist suspension shop to do the suspension