The new system finally caught up with me a few weeks ago. When I returned to route building all I got were the spinning blue circles. Tried with and without my old api key; but I'm not going to give Google my credit card info just to establish an account under their new system. Fortunately, I was able to lay the majority of track on my route while the old api was working, so I'm still able to slowly build things using direction and distance from known-points along the trackage, plus eye-balling features from maps. I never thought shooting mortars in the Army would be useful in this capacity
Edit: I forgot to mention that importing markers into my route has been a bust, despite following every video and tutorial on the internet; that's why I've resorted to using "direction and distance from existing features" for route building. So for all I know, there may be something amiss with importing markers as well; but that's another topic (and I've not posted about it yet).