The biker leader asks a pretty good question actually about carpet bombing the area.
Queen alien is a "Predator" combined with a spider combined with a 'brain bug' from Starship Troopers.
1,500 year grudge? And it's the same queen?!
Was the Queen thinking "
I'm going to kill you... but first we have a little chat while I ignore the fact that you are likely not alone and there may be danger looming. I'm also going to ignore that strange glowing thing that you are desperately trying to reach. For you see, Mr. Mason, not only are we taking over your planet but also your movie villain tropes!"
Kill's the queen... well, that was a bit anti-climatic.
Wait, how come we didn't see the bikers attacking the wall as the diversion. Looked like a diversion wasn't even needed. And all the talk about "Mason Militias" results in nothing but a handful of bikers showing up for the final showdown?!
Seriously, take out the queen and the rest explode like fireworks?
Wait, so from the Lincoln Memorial you're within quick walking distance to the shoreline that was in a different state?!
Oh, and there's Pope, because why the heck not.
How the heck did he even get there? OK, *maybe* Mason's travel can be explained by an unseen car ride but Pope's sudden arrival at the same spot? Did he hitch a ride on the back bumper or something? And why does he look like Darth Vader in Return of the Jedi when Vader is dying and removes his mask?
Now, quick, let's flash forward to an idyllic meeting of people from all over the world. Did transportation systems suddenly get restored to allow global travel? Ann's still pregnant so an awful heck of a lot has taken place in pretty short time. It can't have been much time that passed because Ben, the youngest son, is the same. And did the bikers really need to wear their exact same outfits? Do they ever wash them? Who came up with that new UN logo? Did they have some type of contest or something? Oh, wait, it's not a meeting, it's a speech at the Lincoln memorial and we can see DC is being rebuilt. Just how much manpower is available for massive reconstruction projects and where were they during the fighting?
Gaaaahhh! Delete episode from DVR, delete from scheduling, ponder about all the ways it could've been handled differently.