Proper pressure tank placement
TL;DR: that's really, really weird.

It makes no sense for the pressure tank to be after the hot water heater. That way, if you don't draw hot water for an hour anything hot in the pressure tank will have cooled to ambient temperature. You won't get any hot water until the tank has exhausted enough to  start the pump, and even then your incoming hot water will be diluted by the remaining cold water, which means the water from your faucet will continue to slowly heat up.

It also means that water only  moves through the heater while the pump is on, so that it will rush in and out, probably stirring the hot and cold together, instead of introducing the cold at the bottom and taking the hot from the top.

Even better, if you draw cold water, you'll actually be pulling cold water from the pressure tank into the top of the hot water heater, and then lukewarm or hot water from the bottom of the heater into the cold water line (at least until the pump turns on). More temperature confusion.

Having other fixtures between the pump and the pressure tank is less of a problem; it just means that the water flow may reverse depending on whether the pump is on.