The triple emphasis on proxy wars isn't, I believe, merely a geopolitical observation. While wars happen between states, they also happen between states and NGOs, states and criminal organizations, states and other non-state entities. In each of these cases proxies can be used to execute policy or operations.
In this case, we are not only seeing actual proxy wars (Syria, Yemen, Lebanon), but also intrastate proxy wars between agencies (CIA vs. NSA/MI) and proxy wars between NGOS and states (CIA vs. SA).
It is important to remember that in a proxy war, not only are the players not necessarily representative of the actual powers at play, but that the goals and outcomes of those players may be very different from what they seem.