The first part of the crossover delivered big time for me, tremendous fun!
I loved seeing the characters from the two shows mixing, Digg's reaction to Barry, Iris's reaction to Ollie, the Felicity and Caitlyn science girls scene, and Digg and Cisco debating on who was gonna win between Flash and Arrow lol.
I thought Joe not wanting Arrow in his city made sense as he's a straight shooting cop, he's had no communication with him and Ollie has killed a lot of people.
I also thought Wells reaction made sense as well, he's a manipulator, it was one thing for him to play friendly when Ollie was in another city, but he doesn't want him too close with Barry as Ollie is one of the few people that may look fully into Wells, he's an element Wells can't control and thus a threat, hence he immediately turns Barry's mind to the negative regarding Arrow's influence. The fact Ollie immediately feels there is something off with Wells bares this out.
The only thing I wasn't a fan of was the sudden change in Eddie and him wanting to become JJJ with a badge, it was totally out of the blue. It was as if the writers read the positive feedback on the characters "none cliche love rival for the lead" personality, and decided to do something to assure the audience want him away from Iris.
There is no doubt the show runners played Ollie very much as Batman here, from the way he out-thought Barry to the way Joe made reference to terrorist attacks hitting Starling since The Arrow showed up, blaming him for the villains ala Batman.
Using the villain of the week as merely a means to set up The Flash vs Arrow fight was fine with me and I thought bar the speed punches part the fight was brilliantly done.
Now hopefully they deliver an equally satisfying action sequence tomorrow with Arrow and Flash combining their skill sets as a team!

t: