If a game is poised at 5-0, with the losing team down to 10 men, with 5 minutes left and the floodlights go out, the game is abandoned and replayed as if the abandoned game never happened. There's no authority that I can think of for saying..."Well this would have been the result, so we'll not bother finishing the game".
It might be fair and fine for Liverpool to be declared winners but I can't see Norwich, Villa and Bournemouth accepting relegation for them based on their current positions, especially as Villa have a game in hand over Watford, who are 2 points above them. Also, Sheff Utd. would be 5th if they were to win their 29th game, That could be a CL place gone. If you can't be relegated because the season wasn't completed, in my opinion, you can't be awarded the league either. The only analagous situation is cancelling the game.
If there's no existing authority for a decision and it's not applied equitably across the piece, it's a sham and such a decision would be in trouble if taken to the CAS by a complaining club, affected to their detriment. This is especially so if other countries leagues came to differing decisions and abandoned their seasons.
The season is either played out to a conclusion or it should be voided ab initio.
