Normally, I’d be conflicted about changes to the Arrow timeline, as I tend to dislike the resets afforded by time travel in the Arrow-verse, and I find twists much more twisty when there are consequences rather than timeline tweaks to fix things.
Yes, I’d normally be conflicted but sticking to my guns about time travel on Arrow and wanting the characters to deal with the consequences of decisions.
The heroes of the Arrow-verse are also only human, and Barry has messed up traveling in time often enough on The Flash that I’ve often wanted time travel to be abandoned as a concept on shows other than Legends of Tomorrow.