Doubt it's abandoned! Echo Project are super good with their projects. I think the lack of updates may be due to the fact that it's just a co-writer working on this VN's story as opposed to the full Echo Project team. One of their popular VNs, Adasta, started similarly to this - slow-updating side project that eventually turned into it's own amazing title backed with popularity. The team's currently working on Glory Hounds and the Smoke Room especially, with 2 projects - Arches and Khemia a little on the backburner. Once one of these projects finish, A Role to Play will likely gain some traction.