I notice flaws when a print has a long layer (surface) followed by a quick layer (wall) or vice versa. Every benchy I've ever made from 5 different printers has a "step" in the hull at about the same layer as the bottom deck. I believe its due to a rapid jump in layer time. A feature request would be something like "gradual layer time" or "layer time gradient" to smooth over X amount of layers. and maybe a layer time indicator in the layer view.