What would you guys do?
Depends; What is the season there? Is it warm enough for beetles to lay and reproduce? If so most likely your hive is totally infested with SHB eggs since you are seeing heaps of beetles and few bees. If this is the case, when the beetle eggs begin hatching, there will most likely be more beetle larva than you will be able to count.
Under these circumstances, I would bank the queen, freeze all frames in this colony,
(in order to kill any beetle larvae and eggs, including any beetles which are on these frames or hiding in the cells ); Regroup when your Spring arrives by borrowing a few resource frames from your other hives to create a new hive, giving the banked queen a new lease on 'colonization-hive' life lol; That is if the queen is of prime age for such.
If she is old, I would simply extinguish her.. I would still freeze the frames for future resources and reuse when and where needed..
Phillip