I have recently deployed two different Actiontec MoCA-net links in homes with no available [or pullable] Category cable. They both share Coaxial networks with TWC systems, one has whole-house DVR and they've both proven stable thus far. Bandwidth exceeded 100 Mbps in both cases, which should be adequate for a WAP and superior to the [often highly variable] bandwidth available on a powerline adapter.
"Whatever is rightly done, however humble, is noble." [Sir Henry Royce]