Norwich, Villa and Bournemouth currently occupy the relegation zone and all three would be relegated if a points-per-game system were to decide the outcome of the league. Bournemouth would actually be relegated on goal difference. Teams don’t deserve to be punished for something that is out of their control.
If the season were to be null and void then the real question would be what clubs deserve to play in Europe next season? My answer would be the clubs that represent the Premier League in the Champions League and Europa League this campaign would be the clubs that do so again next season.
If the league does not finish there will be a lot of complications with sponsorship and prize money but better to have those complications to figure out than carrying out games when it isn’t safe to do so.