i can totally see ETM developing their own controller over the next year or two. before NS started producing pumps/wavemakers might not have been a focus, but now they may as well. already have the reeflink, so its not crazy to think they will develop their own unit to control everything. heck, maybe ETM heaters/skimmers/atos as well.
I don't really know anything about the Reeflink, but I bet a module with outlets and probe inputs could be made to work with it relatively easily with some firmware updates.
Having said that, the lack of WXM compatibility is why I now own a Red Dragon return pump.