Really hated the firstname/lastname thing in XIV. It's cool to have a last name but like Arcon said it gets tricky trying to send tells since you need both names... especially if your spelling is bad or if your friend picks weird foreign sounding/spelled names. I guess if there had been a search function at that point it would have made that bearable since you could just /sea first 3 letters and then click on the name you wanted to tell.