Let me guess... you wrote that article based on the pre-I16 press release, right? ;-) More info has been released since way back then, and is included in the patch notes (http://boards.cityofheroes.com/showthread.php?p=2235134#post2235134).

One big "other feature to be announced" is the revamp of the sidekicking system. Now, any level character can team with any other level character -- and everyone is auto-adjusted to whatever level the mission is. So no longer do we have to play sidekick/exemplar tetris. It works pretty much like the teaming in the AE did before this update, just now all throughout the city and Rogue Isles, and it means that you're not restricted to looking only at toons your own level to team with. Another result of this change is that Exemp'ing now gives XP, not just Inf.

There are several other QoL changes (plus the return of an old enemy to the streets of Paragon City), but yes, with most powers featuring a combo of two colors and multiple color palettes, the big draw this time is the colors -- the pretty, pretty colors. Or the choice of no color (on many defensive toggles). Or the alternate animations/geometries for certain powers (martial arts/super strength/spines/earth). Or...