You do have to wonder if some of this is politically driven. Germany are losing hundreds of life's a day, while in the meantime the UK has administrated 23 million doses (not sure the ratio of those that were AstraZeneca) and not recorded a single fatality or adverse reaction and are seeing infection rates / deaths drop. I can understand caution under normal circumstances, but nothing is normal right now.
Its unfortunate they felt the need to stop the administration of this vaccine, as this will only further slow down vaccine distribution in Germany/Europe. I think you've got it spot on there - it stinks of politically motivated attack, but I'm not clear how this could benefit Germany's politicians slowing down the administration of the vaccine? Maybe they can use this as an excuse for the poor administration rates???
BTW I literally just had the Astra Zenica vaccine here in UK - I have a sore arm, lets hope I don't get any of the reported side effects!
It's not valuable in the sense that you can "practice" or "apply" the loop and perform better. Your behavior already follows this model. Its real value probably came from presenting this common decision making process in a way that appealed to upper military management, which made it easier to develop processes and practices that help decision makers (like pilots) in critical situations.
I think this also makes OODA an effective strategy: being able to conceptualise the whole system/problem in a holistic manner, and being able to quickly ascertain what are the important variables/factors, and therefore what you need do to to achieve the greatest impact/effect in line with your goal. This is, in my view, the whole point of OODA, and this takes a shrewd intellect and a lot of practice to get good at!
This kind of goes beyond the basic OODA acronym, but consideration of approach through each of the OODA stages is where the value of this theory resides. Indeed I try to implement this approach in my work as a scientist each day!