Why are people trying to rewrite history in this thread? The people who disliked Discovery disliked it MAINLY because they didn't consider it to be well written, believed it had a muddled plot, and thought it relied far too much on needless plot twists everyone guessed ahead of time. It lacked focus and good storytelling. The execution of ideas wasn't there. The general look of the Klingons or anything else didn't help matters. But people being positive of the show now who weren't previously show that people WANT to like this show. And any small change toward the better gives people hope it will be good.
It's fine if you enjoyed the writing, the storytelling, the plot... and the new visuals and inconsistencies that others were annoyed and frustrated by last season. But to say a minority found problems with the show and a vast majority loved it is ridiculous. They wouldn't be doing showrunner roulette and producer musical chairs and changing so much if that was the case. (Even giving Klingons hair is an insane compromise that's completely unexpected and shows someone is listening, and not just to some minority group of fans.)
I know this and other minor changes gives me hope that if they're going to fix something like that, then there's hope they're going to come back with far better writing and stories. And if they don't, people will have the same complaints about the quality of the storytelling like they had last time.
Showing the Enterprise crew in different uniforms, Klingons having hair and slightly less makeup, a lighter tone, not showing the spore drive at all are all things they didn't need to do, show, or change, but they did, and I think that's why people are hopeful at the moment. If Discovery starts spore driving around the universe an episode in, which is very likely given the set up in the trailer, then maybe people will start complaining again. But with the show making small steps here and there, there's at least some trust back that they'll find a reasonable way to end that tech by the end of the season.