a shallow well
4 meters, so i'd say it's shallow. The pump could manage 11x deeper
compression fittings
Yes indeed.
significant advantages over soldered joints
For the the first couple of fittings, i'd say yes. The pump will give some vibration, soldered joints will break rather quick (weeks) so compression or old fashioned hemp and paste with threaded joints. Further down the road there are a few soldered joints