Well, yes, QMC2 Arcade's functionality is somewhat limited compared to the main GUI. It's actually a wanted design concept... but RB is right, it's mostly a question of "themes", and the Qt / C++ back-end needs to support some of the features as well. There are currently two themes: "ToxicWaste" and "darkone". ToxicWaste supports icons (displayed as part of the item-delegates in the machine-list), but you probably mean something else?!

A mind is like a parachute. It doesn't work unless it's open. [Frank Zappa]