Yeah, there are so many more fun options to use in lower tiers, especially now with the Eviolite, which adds a whole slew of options. In OU, for the most part, it's more or less the same Pokemon over and over, but in lower tiers you see so much more variety.
I still need to make a new DW account for my current White save, but right now I keep resetting the games clock to often to really be able to do much on the dream world.