I have flight tested and approved (by STC) jump doors on Caravans. I did impose limitations, though angle of bank was not restricted for the jump door installation. Different STC approvals may have different limitations. Yes, jump pilots can become 'comfortable" maneuvering the plane to get back down quickly. I flew jumpers for years, and had my tricks too ('never needed to exceed a limitation though). Unfortunately, getting used to rapid descents can make a pilot more relaxed about ground rush too....