For the appearance of the installation, I do not see any violations.
Is the panel a Service or Sub-panel ?
If a Service, is 230.7 met, is the GEC installed correctly, are bonding bushing used, etc. ?
Are the rquired bushing installed ?
If EGC's are installed, are they the correct size ?
Was recently on such an installation. The outside appearance was great!, But inside, horrible.