It's just kinda whatever you prefer on this issue - lots of opinions on both sides.
I have an SA Loaded (not quite the TRP with features and attention to detail) and it also came with the FLGR (2 piece).
Once I put around 2-3k rounds down the pipe and needed a new recoil spring, I went ahead and changed out mine with a short GI style guide rod too (Ed Brown part).
It performs as flawlessly as the FLGR did - so, it will give you no reliability problems whatsoever (all in personal preference).
And by the way, Thank You for your service!!!!