Egypt is coming out of a period of internal instability and able to address external actions of concern. Sudan has an open mind to the IPE findings, mainly that there will be little downstream impact - small enough not to be considered significant. Sudan has offered to cooperate with the project by sending it's own people to help with construction. While Egypt is calling for further investigation into possible dam impacts.
The meeting will be held in Khartoum. Sudan is well placed to mediate between it's two riparian neighbors. If Sudan chooses to take this role, this could bode well for both Ethiopia and Egypt, since Sudan is positioned to benefit from the dam in the areas of increased energy in the grid and reduced flood events - more control of the water flow means that Sudan can expand present irrigation projects. Sudan is also positioned geographically in the area most potentially impacted by Renaissance. Sudan's people of the Blue Nile State that is. The Blue Nile State is still in the grips of conflict and instability following the conclusion of the very long Sudan civil war. People that did live on the river may be displaced elsewhere in refugee camps, but I think that these communities are not priority for the government. Clear data about the communities living downstream of the Renaissance Dam does not exist, but since the dam is being constructed only about 20 km from the border, it is obvious that subsistence communities would be impacted. Whether or not Khartoum is concerned with the livelihood and safety of these communities is unclear. That Khartoum is interested in further water infrastructural development is clear. What the costs will be for these development moves is unclear.
In my opinion, the international community at large could be doing more to help these countries develop in a way where more people benefit than lose.