Alright, that does seem like an important thing to get fixed. I'm afraid I can't give an ETA - it looks like by now we more or less need to rewrite the whole AdMob plugin, and that's a potentially long and complicated project (I think it took at least a couple of months to develop in the first place). We'll try to start work ASAP though and see what can be done about it.
I've said before and I think it's worth repeating, I do think third-party addons are a better fit for integrating ad services. We only support one, and third-party addons support a much wider range. Even the one we do support is difficult and time consuming to develop, requiring regular significant maintenance. As a small team with limited resources and a mountain of other things to work on, it can be painful trying to schedule the time required just to maintain it, especially when it needs a lot of work as appears to have become apparent now. Some people have expressed wariness of third-party addons, but the only real problem is developers who abandon their addons. If nobody is developing an addon, it will probably break sooner or later. If it has an active developer - especially if it's a paid addon with commercial support - it should be absolutely fine, since you have someone to go to if any problems come up.