Right. Everyone will naturally have their own opinion.
For me, I still didn't care about most of the characters, and at least for Inciting Incident, they had no reason to be in the story. Akira and Airi are very unrealistic, which makes them hard to take seriously. Akira's boundless optimism especially clashes awfully with the overall tone of the VN. Had neither existed, I don't believe Inciting Incident would have been any the worse, and I think the pacing would have been much improved.
Elizabeth is a more grounded character, but again, she doesn't serve much purpose in Inciting Incident that couldn't be easily glossed over. I don't think any of these three had any really emotional scenes, either. Maybe I'll change my mind after part 2, but looking at Inciting Incident alone, I think they could have served much more minor roles.
Misaki is a bit better, given her history with Yama, and her status as a red herring about Yama's past. But she also tied in weakly to the central plot. Amalgamating the essetial roles of Misaki, Airi and Elizabeth into Misaki would have solved all that.
The best parts of the VN are the tension of the mystery, and Yama's scenes with Rui, which not only felt the most natural of any of the heroines, but also led to the most depth. The two have a much deeper and more complicated relationship than almost any other I can think of in an EVN, and I think that was actually the greatest success of Lucid9. Needless to say, I'm not convinced the other 4 heroines will be able to measure up, but I'll reserve judgement until part 2 is out.
As you said, however, to each their own. I found the memes cringey and juvenile, but others may find them fresh and humorous. Ultimately, it's your VN, and whether you choose to incorporate or discard any of this is up to you. I did enjoy the VN, and I think it was one of the best EVNs I've played, but I think it could have been phenomenal, instead of merely good, and that leaves me disappointed.