Not too shabby, it looks like your Cable Drop coming in is RG-59 cable however. I would get Comcast to replace that with RG-6. Definitely lose that groundblock you have the drop going into before the 2way splitter. It's pointless if you have a splitter right beside it. Just remove the ground wire from it and there is a screw on the splitter to mount the ground wire. Then just take the input of the ground block and go directly into the splitter, eliminating the in and out loss of the barrell of that ground block.

Other than that, :goodjob: