To me a good songwriter is someone who writes good songs! What makes a good song is maybe harder to define but surely there are good bubblegum pop songs just as there are good more serious types of songs. Matter of taste. Some people may want a good crafted original sounding song with meaningful lyrics whilst others might just sometimes want a catchy tune to dance to. Horses for courses! Re the jumping from 1st to 3rd person apart from again personal taste I don't understand why doing or not doing that would make a song good or not? Re pop tunes doing that I suppose The Boxer is an example.