I watched the first two shows. There are three things I do not like about the show:
1. They kept the exact same formula, simply replacing the host but keeping the exact same jokes and using the hosts in the exact same way. The problem with that is that it makes it look like the new hosts are trying to copy the old ones and it feels fake. Hopefully they will transition to a place where the new hosts will be able to show their own characters and make the experience better for the viewers.
2. I don't like Chris Evans. Thankfully I do like Matt Leblanc. With that being said, when I started watching Top Gear, I did not like Jeremy Clarkson either. But with time I started to appreciate his humor.
3. I don't like the 2 host dynamic. I think that 3 hosts was better. If it were up to me, Chris Harris would be a host on the main show, that guy is amazing and would do a much better job than Chris Evans IMO.
What I do like about the new show is the cross country trial for celebrity. I think that is a good improvement for that part of the show. I am willing to give it time. The crew is the same so all the amazing photography, writing and everything else that was great about Top Gear is still there. So 80% of the show will be the same no matter who hosts. And I already like Leblanc, so there is just a tiny 10% for me to start to like (Evans)