I'll tell you what, the downside to Codex 142, The All-Seeing Codex, doesn't seem that bad. Cover up your boring, normal eyes and get two more magical, floating eyes.
Anyway, my thoughts:
"Hmm.... this is pretty interesting. I wonder what's gonna happen with th- NO MORE?! Awww...."
So yeah, I'll definitely be watching this.
The best answer is always to ask your DM.
Unless you're the DM, in which case you should talk to your players.