I sprayed the inside bottom of the tent with permethrin. I've used this stuff for years on hiking clothes and it does a good job of not just repelling bugs but killing them. Lasts a couple of months.
I put some velcro strips on the back of the backsplash and on the back of a power strip I picked up, that also has usb outlets. much handier than the bottom plug. We never use the sink, anyway.
I made some pvc spreader bars. I didn't like the amount of sag in the tent, particularly at the door if it was rolled up. Helps a little, and was all off the shelf stuff from Lowes. $25 bucks. I may try to put a wooden strip inside it to stiffen it up, and sew up something with pockets to hang light stuff. I also may trip the ends a bit. It's not a perfect fit due to the compound bow of the bimini bar.