I just purchased a Shield 45Cap 4" barrel and couldn't be happier. Very accurate and carries like my 3.3" barrel. Great gun IMO.
Now I'll have to really look at one. My newly acquired understanding is they are very comparable in size to the 365?
I also have the MP 2.0 Pro Series 5" barrel but I left the trigger bone stock. Did you get the Apex for yours? I been debating and I know the Apex is a great trigger but I can shoot the MP bone stock almost as well so it's hard to justify spending $180
I tried the M&P Compact 4" 9mm, BUT could NOT tolerate the incredibly tight radius of the trigger...my large trigger index finger got pinched and was quite painful. Of course, accuracy suffered badly. Sold it and haven't regretted it at all.
You can also get a P365 and buy the 365XL frame and solves the grip issues with a longer grip and shorter more concealable barrel. But you need to buy the base pad that would work for the 10 rounder if you have that limit in your state.
I carry mine IWB during summer and I carry my 2.0 3.6 during winter appendix, done that for about 2 years now and is still very comfortable to me.