For lazy technicians maybe, but to say replace the coil, when the leak is on a fitting, is sloppy work. Most coils can be repaired. If multiple leaks or advisories to replace are known, the reasons may offer a solution to replace the coil. If under warrantee, then replace. If replacing the coil, try to match the coil to get the best SEER available. Most technicians will not want to do this, because they dont know how to do the SEER comparison.