The 1 x 2 inch welded wire is a good start but make certain it is securely attached to wood nails no more than 4" apart. Look carefully at corners of that door; if you can pull them out by tugging on corner of door then consider putting a latch on corners. Move the roost away from corners of pen so raccoon not tempted to reach through fencing to grab sleeping birds. I would make so roosts stick from outer wall off coop and terminate well away from run walls. Better yet have birds roost in coop and close doors at night. It raccoon traffic high then consider mounting an electrified wire around base of pen to zap raccoon probing perimeter. I also also do trapping to keep raccoon numbers down.
I have cameras out most of the time in barn and around out perimeter of my fence. Raccoons usually captured outside my out perimeter. When they did get past that we had approaches making their job more difficult.
Cameras were really helpful because most of time the raccoons took multiple nights of incursions before actually going after chickens. A trap could be relocated to area raccoon was messing around.
I now use lights in the barn, not very bright, so chickens can see a raccoon coming in. The chickens can then evade raccoon and produce alarms that call dogs or myself up.
Think layers as you obstruct those raccoons and predators in general.