In the updated version there are a lot of improvements compared to the actual prototype.
More space around the ESP32 antenna and there is no ground plane around it. In this way, WiFi / Bluetooth range increases a lot.
Special attention has been paid to the temperature and humidity sensor. It's placed away from the main heat-generating components and it doesn't have ground plane next to it.
There is an air gap on three out of four sides to avoid heat from the PCB and it's footprint is multilayer, so it can dissipate also from the bottom one.
In this way, temperature and humidity offset are minimized.