The Flash has never been better when it deals with time matters. Temporal distortions, travels to the past and future, temporal duplicates and how these phenomena impact the timelines of human beings, this is what make both the comics and this show so special and fascinating. From this point of view, this episode has not failed and stays faithful to its roots. I would definitely love to see more like this one.
That being said, we watched another problematic issue: the writers have given up to both accuracy and consistency! Nora has returned so many times in the past, saved one by one the characters from certain death, but surprisingly never once it affected the timeline. While Barry only once saved his mother from death and created Flashpoint with the dramatic consequences that we witnessed in the season 3. So what is the logic there? I wish at least there was a bit of an explanation to this. Like Eobard Thawne finding a way of returning to the past without changing the timeline thanks to the timecodes Nora sent to him in the future or something like that. But it does not seem to be the case and we will probably never get an answer.
That being said, we watched another problematic issue: the writers have given up to both accuracy and consistency! Nora has returned so many times in the past, saved one by one the characters from certain death, but surprisingly never once it affected the timeline. While Barry only once saved his mother from death and created Flashpoint with the dramatic consequences that we witnessed in the season 3. So what is the logic there? I wish at least there was a bit of an explanation to this. Like Eobard Thawne finding a way of returning to the past without changing the timeline thanks to the timecodes Nora sent to him in the future or something like that. But it does not seem to be the case and we will probably never get an answer.