There's no doubt it complicates the change of employer process. That person would have a 60-day grace period after the end of his or her employment during which he or she would be considered in valid H-1B status. The challenge is this: although an H-1B worker can change jobs based on the filing of a new H-1B petition alone, most workers and most companies don't want to make a change unless and until the petition is approved and right now, without premium processing, we just have no idea how long this will take. Note however that once premium processing is brought back, a pending petition can be "upgraded" to premium.