At best they'd boost Myth Tomes again probably to 500 and change how Coil locks you out, for example: "Coil Part 1 (1-5), Coil Part 2 (6-9, not 10? Because 10 would be a boss fight and we can't have that.)" each with its own separate lockout.

Lockouts are a means of keeping us playing and controlling the amount of x item enters circulation.