Good progress...
A few more vias could be removed by re-routing tracks. For example, the one at the top of the 328p is redundant - you could just route the track on vertically to the next via. Also, the two under the 328p could be removed by taking a track from pin 8 below ResR and up to the LHS of PwrC1.
Will the PCB be through-plated? If not, you have to be aware when routing tracks to top-side pins, that you can actually solder the pin on the top side, to make the connection from one side to the other using the leg (e.g. 328p pin 8 ). This isn't possible with an IC in a socket, for example, but may be if you were soldering the 328p directly to the board.
I presume yellow is bottom, orange is top?
The top side track from 328p pin1 could be avoided by routing the track that's currently in the way below ResR.
Hope that helps...