I thought overall that the episode was quite good. Jaime's talkback to the scarab and the Reach was pretty funny. The action scenes were pretty cool. Also, it was really nice to see Zatanna's power. It was also the first time since 'Satisfaction' that we saw Rocket so that was good. However, it did seem to me that the pulled the beetle cure out of thin air. Maybe my memory is failing me but I don't remember Batgirl taking holographic images of the temple walls in 'Beneath'. It did feel like a quick fix solution and just seemed a bit too easy for my liking. Unfortunately, I'm not that surprised. There is still a ton of plotlines to be resolved with only about 45 minutes of the show left so you can be sure that there will be aspects of the last two episodes that will feel very rushed.
PS: Can someone explain why Black Beetle is so much more powerful that Blue or Green Beetle? The team took out Blue and Green fairly easily but they were completely outmatched by Black Beetle before.