Seen a lot worse in my time. Does it follow the absolutely correct way an outside tap should be fitted in relation to the water regulations (WRAS) .... no ..... is it a nightmare of a job .... not really.
To be correct in the eyes of WRAS then an outside tap should follow the guidelines and have an internal isolation, a double check valve (for backflow protection) and depending on how the pipework is arranged a drain off point all before the pipe exits the house. Taps with integrated check valves aren't WRAS approved any more as they were found to freeze in the winter rendering the check valve inoperable, therefore wouldn't give the critical backflow protection for the mains drinking water it was designed to provide.
If you isolate that tap in the winter & open it to drain it and leave it open then as long as it has an integrated valve then it should be ok and perform it's backflow protection, the trouble is most people don't isolate and drain down their outside tap before it freezes, therefore the integrated check valve doesn't do it's job any more.
As suggested previously though the tap that's been fitted may not actually have the integrated valve, can you take a side on pic of the tap and take off the end piece off the spout and take a picture looking into the spout. If it doesn't have the integrated valve then it hasn't been installed properly and you won't have any backflow protection (this is the important part) and you would have a justified grievance with the installer.
