Good point - yes, we have M0-3 class target platforms on our roadmap. IoT Gateway devices was where the need was most pressing for our customers and we just went there first.
Now, we will likely end up doing a whole lot less functionality on an M0 profile, compared to a typical Flogo flow app on an IoT gateway, but the idea is to offload the right level & kind of edge compute onto lower power nodes.
One point worth mentioning is that pretty much any framework can run on a Pi, but running dozens of these Edge apps - "12-factor" style[1], that is where Flogo's advantage shines through.
[1] https://12factor.net/processes