It’s not such a big list after all and apart from variations, it’s hardly a show stopper when you look at the cost of the product. I touched on this in the variations rant; Big Commerce is a relatively cheap product (compare it to Magento or a custom solution for instance). You can not reasonably expect to get your way 100% of the time when you buy an off the shelf product, and you need to weigh up the pro’s and con’s before committing. They offer a free trial, they are easy enough to contact, and there is a large enough community that you can make inquiries around the internet. In addition, there is no real reason to be taken by surprise if something you “must have” isn’t possible in one shopping cart or another. If it is that critical, consider spending a few dollars and get a Big Commerce Consultant to talk to you for an hour or two before you dive in.