You can take the corners harder without the chassis wanting to roll over as easy with more offset when conditions are right, but you can also have too much offset causing other problems, its a balance.
The other problems are not actually caused from too much offset, its too much left side weight. Usually in extreme cases if your machine wants to go into a sideways four wheel drift out high in the corners like my chassis did (due to too much left side weight) its better to move the right rear wheel in slightly until that problem goes away. An inch is a mile when doing this, I only have 1/2" offset in the rear of my currant machine to make it corner better, last years machine I couldn't get enough offset in it to make it work. Its one of those things that will have to be figured out as you go, every chassis is different. Just make your chassis so there is some adjustment to move things around. I have also found that with the right rear moved in slightly, it gives you more control under power exiting the corner.
I would go the full offset with the front axle.
The reason we don't use right hand turns is not because these chassis's won't do it, they will turn right quite well, even with the full offset, its just that we are going way too fast and having a right hand turn just increases the chances of an accident.
The safest class we have is our Outlaw class with zero incidents this season, it also happens to be our fastest, highest hp class.