When it comes to the incubator (or section of an incubator) that you are hatching in, the #1 thing you will wish you had given more thought to is how to clean it. Hatching chicks make a real mess and the egg shell pieces get into all the nooks and crannies. That is why I have adapted a large cooler just for hatching. Currently, I use the drain plug to pass through the wires and put trays into the bottom (plastic cutlery trays from Dollar Tree fit mine exactly). I am considering some modes where I use the drain plug as a drain and fill the bottom with water directly, then when the hatch is over, remove the hatching baskets and the fans/heating elements and scrub out the inside with bleach or Oxine.
Overall, I'm very happy with the current setup, but always looking for ways to improve it. It doesn't take long to clean and reset the hatcher, so whatever changes I make could make it harder, not easier.
I cut a piece of ¼" hardware cloth to fit the bottom with the sides bent down forming an inverted tray. I put either dollar store casserole dishes or cleaned Chinese take out trays under it as water containers. I use the dollar store drawer liner on top of it to give the chicks footing. All easily removed and scrubbed.