Hmm... It gives me hope that SW is going in the right direction. Dunno but I really liked it. I understood when people were pissed with The Force Awakess for that reason, but yesterdays movie didn't feel like old ones I think. I think it had many unpredictable moments where you felt like it was going in one direction but all of a sudden it changes. I also liked the minor details that gave a nostalgic sense to it (like new little creatures, casino and that race thingy) so it felt like a SW atmosphere. I also like how they kept the old focus on Leia while the ship still stays amazing throughout the history of Star Wars.
What I liked better compared to The Force Awakenss is simply the storyline that was filled for the whole duration of the movie. You always had something to look forward to, whether that's new characters or some silly details. It had a good story, it was fun and entertaining. I'm happy with that.
As for the clapping and rooting during the movie...

I can't say much. Sadly I don't go to the cinema often, so I don't know the atmosphere. But we had it too here. I think it's rare but it shows the hardcore geeks that love that universe. They created something huge and even in my small country I get stunned by seeing how much marketing is given into it. We have banners, toys, t-shirts, it's literally swarming with SW things a couple of months before the movie. I've never seen that before. It just shows how much people wank over that stuff. I personally like it (although I always thought majority of old movies were overrated) as I read some of the books as well and I think it's great to see such a huge world created. IMO when episode IX finishes we won't see much rooting and clapping (besides the beginning) as it's going to be something totally different (I mean the story not connected to these chars). There were just too many fans of Han Solo, millennium falcon and other creatues that it literally created a mini sub-culture.
I think Rian Johnson did a great job and I actually love the fact that he was given the role to make a new triliogy which is a different world/period to this one.