This idea would make no sense because even just by negating their powers, how is a little girl supposed to break someone out of a security laced pipeline cell? You just gloss over this (and I'm sure the writers would too) but it seems kind of important? They also have energy rifles at STAR Labs, you think they wouldn't use them on Cicada during the escape?
If you want an alternate trajectory for the show, this would make more sense:
In 5x08, Cisco throws the dagger into space and Dwyer is arrested. However in 5x10, much of the "evidence" that Team Flash collected connecting Dwyer and Cicada is circumstantial, so he's held in jail for awhile (remember, their evidence is that Dwyer works at the factory where his mask is used, they illegally accessed hospital security cameras to monitor victims of the Enlightenment disaster, and again illegally used facial recognition scanning to identify a suspect). Have a couple episodes of Team Flash trying to prove the connection, and then have the villain of the week episodes and Sherloque's investigation into Nora's diary.
Eventually Dwyer is released due to lack of evidence. (I would personally like to see Team Flash get nerfed and lose their hacking tools as a consequence or something, so Joe and Iris have to actually interview people and piece information together, instead of "the computer said it was this person.") Team Flash tries to monitor Dwyer but eventually Barry confronts him and intends to detain him in the pipeline. This is when Dwyer reveals that his brief incarceration has given him all the time he needed to incubate his powers. He recalls the dagger from space and, let's say, kills some of the reinforcements, like Caitlin and Sherloque. Make him a real threat by off'ing some of Team Flash at this point.
I feel like this would leave the show in a much stronger narrative place. Cisco's cure goes from being dumb to a more pacifist option to Cicada's lethal one. Sherloque's death leaves his investigation unfinished, but the two handwriting thing is waiting for Barry or someone to discover and follow the trail to Nora and Eobard. And Cicada, meanwhile, should be having some really dark, suicidal thoughts right now, since he hates metahumans but is basically one himself, making him more unhinged and deadly.
I would like to see more emphasis placed on how society views metahumans. The Flash mostly interacts with bad guys, so how many metahumans are willful criminals? What does law enforcement think of them? Can metahumans escape justice because their powers are unchallenged through the legal system? Is detaining them in Iron Heights actually useful? Perhaps Cicada's method is more publicly praised, so Cisco's cure brings this issue to light? How will Cicada feel when he learns that this doctor / nurse character has been keeping Grace in a medical coma?
There's lots of untapped potential here, I don't know why the story this season is so basic.