As James pointed out, being shouted at by members of an organisation for accepting an invitation to see what they've discovered makes no sense, but the reason I hadn't bothered doing Sub Terra for ages back when it was actually running is that I'd decided it makes even less sense to base a theme park attraction around an ABC tower ride, and on repeat rides it becomes a chore; a hurried, almost stressful experience.
At the Dungeon midways Extremis (forget the inferior Drop Dead) where it's installed is a nice bonus and concludes your visit with a quick thrill. At a theme park though a titchy little ABC tower compares poorly to a proper drop tower if installed as just a drop ride, and as part of a more experience-based attraction like Sub Terra I don't think it's a substantial enough piece of hardware to really satisfy guests or justify the faff of boarding it. In Sub Terra's case you get on, things go wrong almost immediately, you drop, you rise back up, and that's that over and done with in probably less time than it takes to get everybody sat down and lower the bars. It still doesn't get around the problem of the ride not doing much, but that room could possibly be improved to some extent with a longer build up to the drop, with a bit more information given on the egg and more little signs that something isn't right to steadily build tension before it hatches. As it is I feel like there should be more going on to warrant the effort of getting you in there.
Then there's the hassle of it all. You're shouted at. You feel like you're rushed into the lifts, then rushed to your seats in the egg chamber. You're screeched at right into your ears and thwacked in the legs by rubber tubing. You're rushed out of the chamber by the countdown and noise. The second lift shakes about in a laughable manner and makes more loud noises. The exit path makes more pointless noise, and of course makes less sense now without actors than it did when it had actors that themselves made no sense. When you've done it a few times and got used to it it's not enjoyable, just unpleasant, and with the high staffing costs I really can't imagine it'll stick around much longer.
