First of all, The first season, The first season wasn't really that great It was Average/Mediocre for me.
Mostly because at that time there were other school Idols anime which dominated the genre of School idol. But Love live school idol project 2nd season was better and has improved in many ways than it predecessor, which is a good point.
It's basically just an anime about school girls which want to become a School idol group the μ's and want to perform at Love live, for those who watched the first season completly know what is happening in the 2nd season. But is't not another standard Cute girls thing, No, It has more meaning to it especially the last couple of episode you will understand it.
The first episode of the season was notable, The Artwork has got better, the Music/sound got better and It was more attractive in some way.
Sunrise has made a big chance in every part.
This season got more character development and has kind of an own Episode for each cast considering it only has 13 episode.
The story gets better when the last couple of episode was coming, The Third years are graduating and the end was reaching.. Yes they were crying but even though that they pushed on till the reached their goal.
Now that it has ended Eli,Nico and nozomi has graduated from the school but i doubt this will end their story and μ's story
Like any other School idol anime, It has a great soundtrack and each song has only used once except the OP and ED.
The music got at it's peak when they released the ninth episode with "Snow Halation" This may be an old song but it was still amazing, everytime when i listen to it, I get goosebumbs, it's just one of the Best Vocal song that has released been released at the moment.
The visuals were better than the first season (The reason is that i watched it in HD maybe??).
The CGI during the perfomance were mixed well in my opinion, Yeah, Some people may hate CGI but it wasn't really distracting but it was definitely noticeable, It was certainly a lot better than a couple other school idol anime which i watched.
Love live had a long way to go, if you mention the beginning of the first season but they do have reached the top with their amazing Music and Soundtracks.
Like i said before If you think this is the same as the first season, It isn't, it's a huge improvement compared to the first season.
Like any other anime It has come to it's end, the μ's are retired and it has left us an amazing mark upon the anime history but like i said again it doubt this will be the end of the μ's!
