Like Koikatsu, I feel that this game lacks content and effort, same for its in-game systems such as dating and relationships. It just isn't the same compared to the classic AA games; comparison to AA2 is a limp-wristed joke here, and the mere thought of either as a official successor to it, is a laughable offense that deserves a long time in the time-out corner.
In a more detailed and constructive manner, Koikatsu/Sunshine just doesn't have the vibe of a living environment. What I mean, is that in AA2, your classmates had their own relationships(Friends, etc.), and could pursue romance on their own, and certain personalities changed some of these dynamics gameplay-wise, while Koikatsu changes little, asides dialogue. That's not broaching the fact, that these have become a harem sim in a sense, compared to AA2, which allowed other male characters to exist, and you could have yuri/yaoi exist. Tailored away if needed too. What happened to that?
Moving on, both have characters who can wander the in-game map, though AA2 just did a better job of making it feel alive, to a degree. *Though that's a small opinion. That's manlily due to how horrible it is to have a full class, or more than such with mods on a SSD. It feels...dead compared to AA2. You have to look for life.
There was also the fact, just like you, classmates had to raise their skills, you aren't special. (Leaderboards and Competition). That doesn't exist here.
Sure, Koikatsu may have a modern engine, a detailed creation system compared to AA2, and looks better(Well if you don't count the modded version of AA2) graphically, but gameplay just falls flat in many areas that are crucial to these kind of games. I'm saying so in dating, relationships, and events, so to speak. What makes it feel alive.
I find it hard to recommend asides for its character creation system(Studio included), modernity, and ease of use. At the end, I do not consider this AA2's successor, same for Sunshine.