I would agree it is...however:
Emma's personality cannot be overlooked. If she was an only child, it could be forgiven but given her sister is only marginally older it does need addressing. Sure, siblings are not usually alike, but she is hugely underdevloped and there's no logical reason for it. Charlotte wanted to protect her from the world...ok, so why not Suzie as well? There's no coinsistency there. Also, age of the internet, no child is that naive and innocent without development issues (given her surroundings, she has not been raised cloistered in a nunnery after all).
This also (for me) leads to another issue with Charlotte and the writing which I also feel cannot be overlooked in the grand story. Charlotte has been 'at the top' for many, many years. She is well off, very well off. Why not just leave the industry years ago and move somewhere her kids could live a normal(ish) life? She says multiple times about protecting them and how bad the industry is. She doesn't need the money, hasn't needed it for a long time (especially given her apparent fairly frugal lifestyle also). Yet she still stayed in Hillside. She dould even, have stayed in the industry and moved away...again, she is the best of the best at the very top of the industry. She hasn't needed (in the context of the story) to have stayed in Hillside for years now. Many of the worlds top models (in real life) don't even live in the States, let alone live near Hollywood...they still get work.
These unfortunately, are very much contradictions with both her character and the story, as we are presented it. This is also one of my favourite VN's too, but to admonish the faults it has is honestly to be blind, because it does have many.