I don't think "most" agree. And if they did that certainly doesn't validate the point.
Isaacs cant be wasted as a potential lead as the show, the story had zero potential for a man to play the lead. The show was conceived to be about Michael Burnham. Michael is a woman. All the casting woulda been looking for someone to play that character. Most can agree they like isaacs as an actor more than green, preference is all preference.
But the show revolving around the main character itbwas written for isn't a flaw. That's called, the show is about this character so its written about said character.
The problem isn't that isaacs is wasted, the problem is many of you just don't like the show and wish the show was something else entirely. But instead of saying that you say crazy things like "isaacs is wasted and should be the lead" which is essentially the same as saying "isaacs should be playing the woman, michael burnham"
Unless what you're trying to say is lorca should have been the lead, which again your saying the show should be about a revenge driven villain, and then you're talking about a completely different show.