*Spoiler Alert*I just saw the finale Legends episode, not the strongest ending. Disappointing is an understatement, however the overall crossover was great fun.
I didn't see the Supergirl episode, but I liked her character in the other shows. I particularly liked her interaction with the Green Arrow.
The Flash episode was very solid, but while keeping the latest "Kid Flash" storyline, lacked all of the new "Team Arrow" heroes except Dig (aka Spartan), and Felicity Smoak (aka Overwatch) were absent. Kid Flash also was absent for the other crossovers. That made me sad, but at least Team Arrow did show up in the Arrow episode, and they were great: Wild Dog, Ragman, Artemis, and Mr Terrific (Curtis, who I erroneously thought was named FairPlay).
The Arrow episode was my fav, bc it features the Arrow cast locked in a mind control device where they got to live their lives in an idealistic way, meaning all their loved ones were alive. This hit me hard -- it was far more emotional than I expected.
The Legends episode, which I just watched, was by far the weakest, but had some good parts: it resolves the pathetic Cisco / Barry friend breakup, allows Prof Stein to embrace his child, let's Cisco & Felicity time-travel AND save the day (Yay!), and resolves the strange dynamic between Arrow and SuperGirl.
I definitely noticed the Hall of Justice showing up repeatedly, which was very exciting BUT seemed so strange without the DC "heavyweight" heroes Superman, Wonder Woman, and Batman. Makes me wonder just how bad will DC botch their arrival back into TV? I hope they'll reboot the Wonder Twins and remember Martian Man hunter, but the funny part about DC is its such a mixed bag -- awkward writing, lack of commitment to the comic material, and (deliberate?) two dimensional characters -- I'm always happy when an episode doesn't implode on itself.
Which is where my gripe with Legends finale is strongest: the final scene features Flash and Arrow having a drink at a bar. It's horribly awkward, essentially out of character for both heroes, and makes no sense. I felt that someone writing the team up was eager to get to a bar and celebrate that they hadn't f-d up all the shows when the crossover ended.
-- general party scene at end with "Agent Smith" resolve was awkward, weak, and felt so strained. No one cared about Smith, that was a thread no one needed resolved. Would've rather seen Digger's wife Leila there to congratulate the heroes.
-- the awkward Dominators "let's all flee bc the metabomb was stopped" resolution.
-- not enough Legends hero time on the Legends episode. One guy got a new outfit (and powers?) but didn't even get their name mentioned, while the animal-channeling heroine barely got a line.
-- "the new President is hot, right?" WTF? The muscle head really gets too many lines, while so many other heroes got neglected.
Lastly, I have to compliment the crossover bc it tried it's best to honor all the heroes, and they respected the vastly varied hero power levels when fighting the Dominators (SuperGirl really shined in that finale battle).
Now that it's over, I'm relieved. Whew! I want to say "let's not do THAT again", but you know they will. Let's hope the quality remains at this level or better!