I couldn't find anything particularly new in terms of mechanics. Everything I could find came before in other OSR games (correct me if I am wrong).
It is probably the best of the OSR's. OSE being a tiny book just really annoys me too much. DCC is too gonzo for me. Maze rats and most other games are just too short.
This one, while not innovative (I don't think I would use a real time torches rule) is something I would use, has the most charm and the simplest rules.
I like the art, and I hope there will be a lot more. Right now, the pages look sparse (300 words on a full-worded page is oof). I appreciate the bigger font.
I like that it focuses on rules for the game, not adding fluff just to meet some imaginary page count (cough, A5E's 100 pages before you even pick a class *).
I think, overall it will be my preferred D&D clone for ages under 15.
* Trials and Treasures, though, I could take hundreds more pages. That was a great book.
There's also a Questing Beast video on it, if anyone wants to get a first impression:
For me personally, it's not that interesting. It doesn't really bring anything I'd consider new to the table (except for the emphasized real-time aspect, which I consider more bug than feature), and the impression is more that of a 5e take on OSR gaming than an actual OSR game. But for people who just want to branch out from their 5e game, it's probably fine.