How to implement WPSClient in openlayers3?

I was wondering if it is possible (and what is the recommended way) to use OpenLayers3 to do the work of OpenLayers.WPSClient? As shown in the old WPS client example, OpenLayers 2 can be used to operate WPS.

There are OL3 examples for using other web services like WFS and WMS, but not WFS (as of 3.2.1). Is this temporary or by design?

Thanks,