This is a visual novel. NOTHING in this game requires Unity or an online component.
...
He could have done this in Ren'Py and been a year ahead of where he is now.
I'm not surprised with the online component since it's the only hack-proof solution. However I admit it's kind of overengeneered and has gone beyond the sane limit.
I don't mind Unity. Ren'Py games in general are not any faster with the their content updates, and Unity is the default choice nowadays. Powerful, extremely customizable, easy to handle, quick to iterate. It's more like you have to look for reasons not to choose Unity than the other way around.
Maybe when someone has zero experience in games and knows nothing about programming, then Ren'Py and Python might be easier to learn, but I wouldn't bet on it.
NOTHING. The only thing that makes this better than BB is the auto-update, but he fucked that up too. And it doesn't work with the offline version.
From what I see, Glamour is better than BB in all aspects except the online thing. Even the online itself wouldn't be much of the problem if it didn't take up to several seconds for the server to respond.
To be able to update the client-side scripts and the content from the server, the offline version needs just a couple of small changes in the launcher code. There's no technical problem there. I think it's just people have been asking for an offline version, so here it is, the offline one.