Oh I didn't knew you were thinking to get nifty case. Tbh I don't have one but checking on the manual it says this;
Q. The output on the rear of the NiftyCASE is very high is this normal?
A. The rear output simply passes the level input from the “to-out” on the case. It doesn’t
attenuate the signal at all. If the level is too high you should consider adding a VCA,
mixer, or other changes to bring down the signal level prior to plugging into “to-out”
and
Q. Is the out balanced or unbalanced?
A. It’s unbalanced (just like us)
So looks like it doesn't normalise hot eurorack audio signals to line levels. Oh one tiny thing about modular if you're just stepping in. It's always a great idea to skim through the manuals before commiting to a module. I personally automatically skip modules if they have 100+ pages of manual.
For the mims; yea it does look odd but it's fantastic sounding module. There's a reason why it's all the way top on loopers, repeaters, reverb on modular grid ;) I'm planning to get rid of most of my modules lately but going to keep a few one. Mims was literally the first module that I've got for fx rack and going to keep that one again.