I was personally really impressed with what we've seen thusfar. I've been taking care of my 7 year old cousin for pretty much his whole life, and I've seen what many kids shows are like... this looks like it's leaps and bounds ahead of many of them. It looks good imo. I'm really not bothered by Kion's Roar of the Elders, I'm pretty sure it's not going to be used constantly, and even so, this show still looks better than many things that are on TV.
But then again, I like quite a few kids shows anyway, so...
But not all TLK fans have to like it, and I've seen quite a few people who have issues with what's been released. It's fine to think it doesn't look good, or to think it's disappointing, not everyone has the same standards and not everyone likes the same things. That's just fact. I do think people should wait until seeing it before definitively deciding it's good or bad, but if someone isn't interested to watch it, then they shouldn't.
We're all here because we like one of the films, not because we all like all aspects of the franchise and the fandom. Some people only like the first film, some like the first two, but not 1.5/3. Most people dislike the Timon & Pumbaa TV series, a few don't. Some people are advocates for the semi-canon characters... some are sick of hearing about them. Some people will like TLG, and some people won't. It's not a big deal.