Genie is not the same as the concierge.
Genie gets you private scheduled times for ship tours, ifly, flowrider, etc.
The seats you want at shows reserved.
Food and drinks in the room whenever and usually before you even have to ask.
If you don't use UDP or DBP then I see it has less value for you. Personally my family does coastal like 2 nights on a 1 week cruise and tries to hit every specialty.
I personally don't see the difference between sea/sky and a Jr or balcony room.