Customization? You mean reset leve offers so that you can easily farm the guild points you need, and get all GP abilities? That's not really customization, it's just extra grind. I'd much prefer not having to pass on the guild point leves, and having more gil rewards offered.

The potential for customization is there, but unless it requires more than just leves, which are extremely easy solo content, then it's not really customization. Everyone will have every ability eventually.