I assume the upcoming changes you're talking about are the new "structured styles", which I think are overall a good idea. Ultimately, though, the key remaining

I assume the upcoming changes you're talking about are the new "structured styles", which I think are overall a good idea. Ultimately, though, the key remaining question will be if they can balance the need for customization with some level of uniformity. So far they've been very slow with the beta test and appear to be taking feedback into account, which leaves me hopeful that the final result will be a net improvement. I think that overall it's a good move for Reddit, as the prevalence of pleasant-looking neutral themes like Naut is a good indication that the default is not really good enough anymore. My hope is that the new structured styles will provide a good balance between customizability and clean design that other sites might follow as a lead.