TS4 is getting a complete "refresh" in design and look. I guess TS5 isn't happening soon....

The only thing I have to say about the color choices, is there is NOT enough distinction between the aqua color for EPs, and the shade of blue for the GPs. Some people have difficulty discerning colors, as it is.

As for why EA has chosen to do this, is a mystery. Perhaps, one day they'll disclose it with their customers, but probably not. So, don't hold your breath.