I
may be one of the guilty add-feature requester
It is only
a request based upon experience while doing something the
I do (sort of the same process that trips up bugs

). I try and think if others might be using simalar process and find it useful. (there are many that fail that test and never get submitted). Some come from something I did that caused pain

that I wish to avoid in the future.
Maybe, I am the only one doing that (pink background) or may be there are more people that set a background to different colors. I can't know, So I fill out a request.
Maybe it gets votes. Maybe you see a pattern, of what they really want is a background color chooser

. (
I know how to edit a CSS to do this, but that doesn't say a tool(bar) (plug-in) wouldn't be useful to many. )
You get to see the requests.
You know how it fits in with what you have coded already (been there. Some decision 1000's of lines ago now blocks that path.

).
And maybe
You go
I use Sigil every day. It is even easier than ever, since the "Edit with..." plug-in in Calibre got added.
Let me just say
Will I stop using Sigil even if you never add another 'feature'.
Probably no
Will I call you names (other that
stubborn 
) NEVER
If I hated Sigil or flightcrew it would be gone from my systems.
I hope you hang in there (even if you say NO to my suggestions).
Take a break. Have a brew.