I have no idea how this can be solved entirely, except reducing HDs and Panda base destroying with a slower and/or more controlled expansion of the pandorans, as we already discuss here:
https://forums.snapshotgames.com/t/pandoran-structures-as-a-network
But as a result, I would like to see that there are significantly fewer of these routine missions and more story missions.
In my opinion, compared to the number, the ratio is far too much for the routine missions and far too little for the story missions and I think that should at least approximate:
This one was a longer campaign over 4 months.