Okay, this is my first post on the site but, I noticed something very important missing from either side. I may have just overlooked it but nobody seems to have mentioned; Kaladin did kill her beloved brother, she had committed both matricide and patricide. While it may not affect the problems she will eventually have with him, it most likely will. Also, while I have read many things against Shallan having feelings for Kaladin, it is there, but only the very beginning, she is very intrigued by his intensity; his passion. Which I will say is not sexual tension or physical attraction like she felt when first seeing Adolin.
I do not think that right now she is in love with either but infatuated with both; without realizing her infatuation towards Kaladin.
Also, people are saying that they do not like the idea of a love triangle, but it does not necessarily mean there will be one, there are many ways to resolve a conflict while writing.