I don't have any concerns about his fit in NYC with Melo. He is a good player. Pau Gasol was a purportedly "soft" but skilled player. He did fine on the Lakers next to Kobe. Love would do fine on the Knicks next to Melo. If the coach is any good, he would figure it out. There would need to be some adjustments or considerations but I don't see it as that hard based on the talent of the two players.
I think Love's motivations for making sure he is seen are in order, Love likes to see his name/picture being tweeted and talked about (ego), he wants to send a message to Cle that he intends to keep his options open, and he likes to go to baseball games at famous stadiums.