With the V3 community patch having gotten to the point where the game doesn't crash every week I've been able to play it a bit more, and I think my main impression is that they haven't taken Victoria 2 and modernized it; rather, they've taken their newer games and tried to hammer them into something Victoria 2-ish, without much success. It doesn't feel like "V2 with pretty graphics and some gameplay improvements". It feels like someone took their most recent games, like HoI4, and reskinned them to look victorian. The construction queue works like HoI4, trade seems to work like HoI4, the UI looks like their newer games, I think the pop system is basically the one from Stellaris, decision trees have been replaced with EU4-style missions, etc.
People have said in the past that Paradox couldn't make Victoria 2 today if they wanted to and others have said that probably isn't the case, but I think it is. Paradox legitimately can't make Victoria 2 again, all they can do is reskin their new games to look victorian. The devs have said of the leak, "We’re not mad, just disappointed." and I'd say that's how I feel about the game itself.