I'd also like to point out that Gringotts is a groundbreaking ride utilizing never before used technology. 7DMT is a nice ride but it's hardly innovative, and was long overdue. Gringotts is not nearly at that point. If it takes a terribly long time to get to full capacity I would understand your sentiments but at this point, I really have to disagree...
What is groundbreaking about Gringotts other than the mashup of ride vehicles?