There are wide ranging roles for the survivors and those who are immune to EVD; maternal and family planning care, taking in orphans, contact tracking and surveillance, community education, training of international health workers, community care. An effort needs to be made to document the roles needed, set up programs which balance the greatest need with the effectiveness. In an ideal world, programs would be evaluated. Communication needs to happen to make sure that opportunities are not missed for controlling ebola and mobilising communities.
Also, I am not sure how community health workers are being recruited. However, this WHO report has ideas on capability building for research, I would imagine similar ethics apply in this scenario. http://www.who.int/ethics/Ethics_basic_concepts_ENG.pdf?ua=1