THE FLASH: Iris West Gets A Superhero Costume Of Her Own When She Gains THE FLASH's Powers

before y´all start complaining

(also not a coincidence they release this in the middle of black panther succes)

It's kinda dumb when every supporting character of a hero gets superpowers, especially if they are the same/similar to the ones of the protagonist.
It doesn't make him/her special anymore.

If the DNA is connected to Barry's powers, then in theory that's the show over.

You've isolated his DNA and have the ability to remove it from him completely and give it to others, this naturally implies you know what aspects of the DNA are needed to grant access to the speed-force and thus gain Super-speed.

Here is why this breaks the show;

• You've remove the speed-force from his DNA, you know exactly what causes super-speed and have the ability to remove it. Any future speedsters you can therefore remove the DNA giving them access to the speed-force. Fast villains can no longer be used as a result as you have a method to unpower them.

• You've identified what DNA causes the super-speed, you can also clearly transfer it to Iris without issues despite her having different DNA, so you can now create unlimited speedsters. At this stage it's just a simple matter of introducing encouraging cell division and you effectively can bestow anyone with the powers of Barry.

All of this shows weak attempt at science that breaks the premise is simply for introducing a power swap scenario. It would be more believable if the two were in an accident involving the speedforce and somehow the powers transferred temporarily.