Marco is a terrible singer, just awful.
If for touring the world in front of thousand people, I agree. If he'd played in small pubs that would have been a different story. He plays guitars greatly though. This, and the fact that some of their members and promoters pretended that they WERE Dire Straits have been their major mistakes.
Usually, I have no problem with cover bands. I've seen some (Beatles, Queen...), they were "anonymous" musicians who didn't pretend to be what they were not, playing great, paying tribute to the real thing and having fun doing it in front of happy (nostalgic) audiences.
Are Legacy still touring btw, pandemic apart?