The old heater was shorter. They didn’t adjust the cold water, so it’s under stress and sitting directly on the top of the water heater.
That also caused the vent to be flat now. There’s absolutely no rise.
Expansion tank wasn’t even required, the system isn’t closed and the chief plumbing inspector isn’t requiring thermal expansion devices in a normally open system. It’s also hanging by the piping. So they wasted their money on that.
The drain pan drain is undersized. It’s 3/4” copper.
The cold hose is looped and touching the roof.
The hot water pipe is literally hanging by the stainless hose.
They left the original gate valve that was installed 40 yrs ago and now it doesn’t operate.
Pitiful job