Hello there, I absolutely adore micro needling. I, myself, have received many over the years as a provider, and have seen the results first-hand in myself, as well as my patients. Micro needling can definitely help with large pores, and it will not affect the filler you currently have your cheeks (that is injected much deeper). Pores are also best treated with at-home skincare as well as monthly deep-cleaning facials. By keeping the pores clean, you will allow them to constrict, decreasing their appearance. When they are full of oil/makeup/dirt, it causes an expansion. Collagen stimulation will also help to constrict their appearance as it is stimulated, causing a tightening affect. That being said, genetics play a large part in pore appearance, so there is only so much reduction that can be done. Hope this helps, Sarah RN BSN