If IPL Causes Collagen to Shrink, is New Collagen Built Around It Always Uniform or Can New Collagen Be Uneven?

If ipl causes collagen to shrink, and allow new collagen to be built around it, isn't shrinking collagen a negative for the skin? How can the recovery be uniform? Is that why most people post ipl see uneven texture on the skin, drier skin, and go through fat loss? It's sounds like it's collagen that's not recovering, regardless of age or skin tone.