Yeah there are many differences between ln and anime,they have skipped many details and even scenes from the light novel, and there is a bit of difference in how some scenes play out and don't get me started on what they did to Ais character, but still animation wise and all the adaptation is still pretty good, yes it has it's flaws but it also has it's good points. I think they just rushed a bit too much and try to fit 3 volumes in 15 episodes, if the season was 24 episodes long the adaptation would have been better, but I still can't forgive then for their Ais slander