I can't imagine putting a metal crimp in the middle of the line on my reel.
The thought of the crimp abrading the line above and below it would give me nightmares.
I would much rather use chinese finger cuffs that are smooth and will not cut, nick or abrade my line during a fight with heavy drag on a big fish.
With a loop to loop connection you can switch out top shots or wind-on leaders or anything else while underway.
Ditto for glue that some say attacks the mono over time.
Capt. Art