I wish I had more hands, to give this install 4 thumbs down.
The insulation on the Gas line should be thicker.
The liquid line should be insulated.
I no doubt have an idea that, that is all the insulation on these lines, I doubt there is any under the building, think condensation problems.
I might hear cries of "it doesn't get that cold here", but if you read the manual of any A/C / heat pump unit they specifically say that all copper lines shall be insulated up to the ports on the unit.
New gasses mean that the pipes are carrying higher pressures (think R-404A).
In some environments, it isn't hard to blow a bit of liquid line, if not insulated, sunlight will often help.
Add moisture, we've all seen copper turn green, that is the start of corrosion.
All of a sudden you have customers peeved at losing all their gas.