It's looking pretty good. I've noticed the type of grass and cutting height make a huge difference. My yard is very dry with warm temps which is making the grass very tough and leaves some stragglers and also a little more wheel tracks. I try to mow between 2.5 and 3 inches and I do notice a better quality cut at 2.5 but I'd rather mow at 3. The dandelions are a pain but I take care of them with chemical warfare. Give it a little time and try different amounts of overlap and maybe mow in different directions. It's strange that you had to trim the blades a little, might have been a little quality control issues. It wouldn't hurt to make a quick check of the rake of the deck but it shouldn't have changed much and not from new blades. Keep us posted on your results.