They should change it to quality starts (depending how you define that) or how many innings the pitcher average per start.
Quality Start is defined as 6 IP and 3 runs or less.
That's a 4.50 ERA.
A "quality start" isn't even a quality start.
While I agree that Wins and Losses are not the best ways to define a pitcher, it remains a decent part of the conversation when taken as a part of a collection of other stats...over a large sample size.
Also, Wins meant a hell of a lot more in prior generations where throwing Complete Games was a lot more common.
Doc Gooden won 24 games in 1985 with 16 Complete Games. And there are a lot of other reasons why that season was incredible, but just on wins alone, that's a heck of a lot more impressive than Justin Verlander winning 24 games in 2011 with 4 CGs.