At the moment there are few features in it.
1.) wall for the overall eco world community and for your own precinct. Your own precinct will allows only residents from your precinct to view them after they've VPed.
2.) group chat (I did not tried them yet but you can basically add all the members from your precinct which you can see them in your contact list)
There are few reasons I did not want to make full use of them
1.) I find that they are not user friendly which causes lots of people do not want to make full use of them. Whatsapp it's still a better option temporarily.
2.) I find that whatsapp and Facebook has more useful features for information sharing and Poll vote. There are still space of improvement that I think EW Apps need to change so that people are keen to use them.
Having said that, although Whatsapp can only cater up to 200 + members (will be more if there are multiple owners, wife etc), they are still currently the best available option for discussion and quick solution. I hope to see more improvement on the EW Apps so that when it's ready, we can migrate the group chat from whatsapp to EW Apps near future. I trust it applies to Tenderfield, Merrydale and Cradleton too.
Some functions in the Apps seems to me quite useful and convenient though not sure when can all be available for use. If bssed on most of the daily Apps that we use as reference, from time to time there will be upgrade for better features and efficiency. Just hope that similar enhancements can happen to the Apps.