55 Gal FOWLR - seeking criticism

[intarsiabox]

I don't know anything about your particular skimmer so not much help there. I see that you have two drain lines on your overflow that you tee'd off into a single line. This cut yur drain capacity in at least half depending the output size of the tee. I'm not familiar with eshopps overflows either but maybe it needs to be at full capacity for it to be quiet. If you want to continue to use an external skimmer I would have one drain line go to the skimmer intake and the other go directly into the first chamber of your sump (not the return section).