Not only will it dramatically improve but if you keep at it and even try getting to the final stage of skating with no laces or at least the first 4 eyelets dropped (this is for training, not game time), your pronation in skates will eventually disappear. Deep deep power turns take more effort and training to stop the foot collapsing inwards but for skating in a straight line, stopping, transitioning etc (ie 99% of your skating) you will skate neutrally aligned aka directly over the top of the blade with your ankle, knee, hip etc correctly aligned.
It's not as easy as shifting the holder or shimming but it is the ONLY way you can properly fix pronation in skates.
ps - do a lot of one foot backward skating, particularly inside edge work. Because you are more on your toes with less heel support the leg has to work harder to stop the pronation. Pronation is not just about the foot, the entire leg is involved. Skating backwards places more stress on the arch, side stability muscles of the ankle and achillies and the upper outside hip muscles a lot more than forward skating.