Reading your posts I agree. Developers need the complete cross platform package when developing games. Here is my list of things I need.
Advertising (banners and fullscreen) and IAP - This is important for developers to offer a cut down version of the game, but while still being able to monetise. I see you have provided this. Thank you.
Social networking - Facebook as a minimum. This is very important for marketing our games. I see the share plugin, however I think developers need a more integrated version that doesn't take the user out of the game or prompt them to post.
Google Play Game Services / Apple Game Center - Again another important social tool.
Local push notifications - This is required to draw people back into the game. Lets say you have lives that recharge over time. You need to tell the player that they have been restored.