I think your thread would probably be better titled "Plates vs. LTR." "Love" is such a charged word to use and not something I think you are ever going to feel for a plate.
There are pros and cons to both. But generally speaking, unless the woman has come forward herself and demanded your sole attention, I wouldn't consider her LTR material in the first place. If she doesn't believe herself that she is worth being my one and only, why would I go out of my way to give her that status when she herself doesn't believe she is worthy?
You have an interesting situation, because most high value women are not going to tolerate being plates generally at maximum around 6 months before they demand exclusivity. If you say no at that point, they usually hang around for a very short amount of time after and fade out of your life. I won't judge these women you have as plates since I know nothing about them, but it I would say it is very atypical situation you are in unless they are very low quality women.