Two ways I would try and do that.
To increase mid corner steering and not upset the weight transfer balance I would shoot for more tire camber at mid corner and try to maintain the roll centre height. There are few ways to achieve this:
1) On the front shorten the length of the camber link and lower the inner ballstud or raise the outer. This will raise the front roll centre slightly and increase the camber gain. Now to get the Roll centre back where you want it remove shim from under the lower hinge pin. This will move the roll centre back down and only make a slight change to the camber gain. Now you will have more camber at mid corner and maintain the balance.
2) A more aggressive change would be to increase the front caster. A 2 deg change in caster will make a big difference in the camber angle with increasing steer angle. If you want a less aggressive change you could add a shim under the front lower hinge pin which increases kickup and adds to the caster. A .5mm shim will add around .5 deg caster.