Spoilery also:
I Liked the Episode. It fleshed out Prime really well, he is a very "by the book" style leader, and was even moreso when he was a younger bot, and it cost him a team member and friend.
Sentinel behaved more or less like I expected him too. And he is Captain America in fighting style.
It was fairly obvious as to what was going to happen from the moment you see the Giant Spider, since they made no effort to change the look of Arachnia and Elita in their robot forms, and since Elita didnt ever transform.
Elita's power is rather stupid though (yes I know it was for a plot device), mimicking other robots skills is great and all, but them only lasting 5 seconds is a tad silly, and not really worth the effort.
The thing that really dragged the episode down was the lack of Prowl and Ratchet back in the present, those two would've been great to bounce some one liners and whatnot off. Instead the annoying Duo (Bumblebee and Sarri) plus Bulkhead (another "my bad" to boot) mainly teased Prime and were general annoyances. Prime should've slapped them back into line.
Black Arachnia crying at the end seemed a bit too much, it's fairly obvious she will return to being an Autobot, all they managed to do was fall into stereotypes "no matter how strong the female warrior is, she will always cry and be emotional". She is a far cry from Beast Wars Black Arachnia.
Looking For: Wreckers Saga TPB Collection (with Requiem)