I think this show was just to cover the six month gap in CC. They have resolved all issues- got the Team Flash aka SuperSTARS together again, got Papa Allen out of prison, DCized the show and filled a small void. But in the process they have created abigger void... i dunno really. not a really good premier but they…

What’s more, I suspect that Eddie’s death was so, so, SO momentous that only a singularity could take it all in(so to speak) and therefore the only rift in the timeline was the decline of the Thawne family. What they did prior to Eddie’s death would remain in existence i.e Nora’s death but not much more.