The braking and front turn in has been impacted by the weight concentration up front.
The rear of the car also rises under hard braking which unsettles the rear. The rear struts need more rebound and the front stiffer compression and a firmer rate.
Its noticible enough to warrant investigation. Another solution is to pick up either ridetechs or V3s.
Outside of coilovers, a good set of dampers would be nice.