The problem I have with customization options is that I don’t want to customize it, and when I go looking for a setting to change, I don’t want to be drowning in options that I’ll never use. The way I always thought about it is when I buy a saw or a hammer, I go straight to using it. I don’t customize my saw or hammer. That’s not why I buy them. I buy them to build things with them. The tool is not the end goal. Similarly, the DE is not the end goal. I want to spend time getting work done, not spend time customizing my environment.
Recently though I’ve been looking around again a little bit, looking for a DE that has what I want out of the box. LXDE seems closest so far.