In that case, I'd recommend structuring your scripts such that you can easily rerun them later on (e.g. using a Makefile). That has also other advantages, such as the ability to change graph colors, axes, or even data.
But everything in MATLAB, then I just symlink the pdf figures to the manuscript folder, so with an F5 in MATLAB and a build in Sublime I have the manuscript updated.
You could probably do the same thing but do the export of the tikz file instead of the PDF. That's basically what I do.