I love QuickWest and ship it with all of my heart, but Jesse has a city to protect too. Unless Harry somehow gets speed (*chants Johnny Quick, Johnny Quick under my breath*), who’s going to defend Earth-2 Central City against metas if Jesse moves to Earth-1? And how many speedsters do you really need in a city?
So, clearly, the solution is for them to save Iris, and then Wally and Jesse live in Earth-2 Central City and get their own spinoff show. Problem solved.