MS has never been known for good UI design.
I think a simple line spacing option is not asking for 20 features. Sure "just one more" can lead to 20 features if done 20 times and thus how feature creep usually happens and why it earns the term "creep." I don't think the solution is to refuse to add new features. Then you end up with an application that is too limiting.
The key is giving people the ability to customize their UI. I can do this in most Adobe apps, in Maya, and various other apps. I can customize Photoshop to have only the tools I need for photo editing, yet switch to a layout that has all the typography tools I need if doing a graphic design project that calls for a lot of type. If I had every palette open, it would be a mess. So, Adobe gives me the ability to show and hide what I want.
So, your concern is valid. I just want options that can be toggled so that we all get what we want and hide the rest.