From a purely selfish perspective, I'm glad Sub Species is back since I still haven't done it. I appreciate it's past its best and such, and it's probably time for a change, but yeah, glad I can try it.
The loss of House of Monsters is a crying shame as that was brilliant. Hopefully Darkest Depths is a worthy replacement, but given that almost definitely will be a temporary attraction, I'm not hopefully.
Agree with Lofty about the upcharge system. Just have a package for all 4, and then single maze options. Singling out a 4th, more expensive, maze subconsciously raises expectations, which I highly doubt it justifiable.