Well you'd have to drop really slow. The bench and squat numbers really favor bodyweight just from a leverage standpoint so you'll need to offset the decrease and that can be hard to do on a major weightloss program. Either that or just drop the weight quickly in a responsible way and deal with getting stronger afterward.
What you are experiencing isn't odd, look at most NFL lineman or other strength athletes post-career, they always make an effort to drop down to more reasonable levels. Sort of like a car, people really yearn for Ferrari yet once they get one it's more of an occasional drive for fun, what they really want 99% of the time is to be comfortable on their daily comute. Unfortunately, you can only own one body at a time.