HAS59 - that's exactly what we bought it for - WP Tanks on the German plains, Iraqi tanks in the desert! However, we found it equally useful in other ways. When it comes to MTI, you are just thinking with a tactical hat on. Don't forget if something stops, SAR can help ID it although you will always need PID from a visual/IR source before going further. However, as a strategic asset MTI is much more useful - knowing the pattern of life in a target area can be hugely important, and that is what the PJHQ planner was on about. Unsure of the exact detail because I wasn't there, but when the French 'borrowed' Sentinel in West African order to help identify rebel strongholds, I understand that the job was pretty much complete after one trip - a scan which took in the whole country, look for the MTI hot spots. Here be rebels. Try that in your Protector!
I'm sure some of the AIA's who lurk on here can provide much more detail !