After finding out (ironically) that this episode actually screened in my own country almost a month ago, I've finally had an opportunity to watch this outstanding episode. The crew behind BATB successfully and respectfully integrated the Doom Patrol into their cartoon universe, and the characters were definitely true to their comic counterparts.
I particularly loved the inclusion of many Doom Patrol comic covers from the original run, as mini-adventures (2-3 seconds each!) - a wonderful touch. Also, it was a delight to see "posters" at the circus featuring none other than Beast Boy, Dorothy Spinner, Lodestone (Rhea), and Shasta the Living Mountain (from Doom Force)! The writers and animators clearly made a genuine effort here!
Story-wise, it was entertaining, and focused suitably on the Doom Patrol. Without spoiling too much, the ending was apt, and yet touching. Congratulations to everyone involved!