It doesn,'t change the fact that it's tedious to select one or two characters. They are also always moving in unexpected ways.
Clicking a portrait to select a character (that you can see, right there) is also much less intuitive than simply clicking on the character. If I recall correctly, clicking on the character model of another party member will initiate dialogue, correct? It feels completely unintuitive, and realistically you're going to want to switch party members much more often than you would talk to them.
Full disclosure, I've worked on UI projects for apps before, so I can be highly critical, but I also know that clunky UI can ruin an experience.