Love most certainly is vivid and complex. As for love being internally coherent, I think most of us would have to ponder on that before immediately agreeing. Love, at times, can appear to be quite incoherent. Love is intricate and it has many facets. It seems we choose not to participate in it or are forced, to a degree, into not participating in it through rules and regulations.
Love does consist of many other phenomena by current perspective.
I would have to disagree, however, that love has to be a phenomenon. There is no reason for love to be if it is in everything that we see. We simply have too much of a drive to segregate everything into separate categories. From this we skew the image of love in things. I look back at the lives of ancient philosophers and the way they were perceived, looked at, laughed at, ridiculed and sometimes persecuted.