I'm a spaces person. Sharing code among folks who's editors have different ideas on how big a tab should be have cured me.
My current editor is set up to "Outdent" a line on Shift-Tab. Heck, I don't even need to have the cursor before the 1st printable character. This handles many of the OP's concerns.
I've also bound perltidy for easy access within my editor. That and a well formed .perltidyrc file do wonders for maintaining order in my source.
I have heard the occasional horror story about perltidy introducing bugs into code, but I've been using perltidy for quite some time on my own code, published obfuscations and published japhs (it really helps understand what these crazy folks are doing) with no ill effect. I do wonder what atrocities these story tellers were committing and what vintage of perltidy they were using....
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