Why do we still need to submit horrible looking manuscripts (double spacing, figs separately) to journals when we build them in LaTeX? 

No, I haven't yet been lucky enough to submit to your journal. You sound amazing tho wrt to this! 
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My fault for the mix-up as I hadn't properly parsed what
@JohnnyFoxe said.
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I interpreted it as "you don't need to" whereas he meant I would not have needed to had I chosen you!
End of conversation
New conversation -
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We are :-) Open reviews, full transparency, no fees, society-owned journal, no ed-reject for novelty, no crazy formats
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I wish I did the kind of research you publish then!
End of conversation
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