Not gonna **** on it in their threads but... That CW DC crossover was insipid as all get out. Everything that is subpar about those shows wrapped up in a bow. Bar the SFX and costumes this is really mediocre TV. The dialog is so bad. The characterizations are terrible and cliche and so much is forced. There is no sense of stakes at all thanks to Felicity, Cisco and the other supporting characters being "geeky funny" every minute.
Then there is the way the writers just don't think things through when it comes to things. Why did Barry just let a gang of aliens just walk right by him when this started? Why does a group of scientists not use common sense when looking for the Arrow crew and think "Maybe our friends that were transported onto an alien spaceship... Maybe they are, ya'know... IN SPACE?" Why waste an entire episode of a crossover with the Arrow team in a derivative story we have seen many times before? Why did Barry run Ollie and Diggle all the way to the penthouse? Why not take out Vigilante right then and there?
The answers? Greg Berlanti and his writing staff are really, really good at making really, really mediocre TV. I like seeing super heroes fighting aliens in their full costumes as much as anyone but the rest of it is piss poor. The ratio of quality to well done elements with these shows is just so very disappointing.