I don't understand the point of Prime Barry losing his powers. To me, it served no function.
On the contrary, it was absolutely essential. If Prime Barry had his powers, he could've just left past Barry to his own devices after getting his powers, then gone off to deal with the Zod crisis on his own. Losing his powers required him to stick with past-Barry and train him to use his powers, and also gave him a reason to track down Batman for help.
Also, Barry losing his powers was a plot point in the original
Flashpoint story in the comics, although there he was powerless from the start because of the timeline alteration.
And then to have Bruce just rig him up to some Frankenstein contraption with (hopefully the right) random chemicals around him to get them back?
Presumably not random. Barry worked in that crime lab; he would've known exactly what chemicals were on that shelf. There's abundant precedent in the comics for Barry being able to recreate the exact conditions of the accident -- that's how Wally West became Kid Flash, as the result of a rather reckless demonstration the Flash put together for his biggest fan Wally. Indeed, there was a tie-in comic to the 1990
Flash TV series containing a story written by Mark Waid, shortly before he started his iconic run writing Wally's Flash, in which the show's Tina McGee recreated the accident and a random punk became Kid Flash as a result, albeit temporarily.
Also, this is another plot point from the comics story, although the alternate Batman there was Thomas Wayne, and Barry was badly burned in the first, failed attempt.
The falling baby scene, for me, was a really good set up. Yes the Wonder Woman cameo was shoehorned in, but I never tire of seeing Gal in the role, so it was welcome. The CGI babies didn't bother me, but maybe that's because I was watching it on TV, rather than in the theater.
I don't get why people are bothered by that scene. It's so over-the-top that it can't be taken seriously. It's in the tradition of cartoons going back to Popeye's
A Dream Walking and Chuck Jones's Marc Antony/Pussyfoot series, and more recently
Animaniacs' Buttons & Mindy cartoons, where a caretaker desperately tries to save a baby (or kitten) from a series of deadly perils that the baby sails through unharmed while the caretaker gets repeatedly mangled. And it's a great way to showcase how Barry uses his powers and his ingenuity.
Ezra Miller really owned the role and brought a lot of emotion to it. I'm sorry we won't see [them] as The Flash again. Solid B+.
They were good in the role, yes. Well, better as Prime Barry than the younger Barry, who was pretty annoying.