Honestly all three titles of the Thrawn trilogy would totally work for the Sequel Trilogy. Heir to the Empire, Dark Force Rising, and The Last Command.

I really like Balance of the Force as an alternate title. Legacy of the Force works too.

I see what you mean how if you remove her name change, it might warrant a title change. I think if you emphasized the “rise” of the Skywalker legend throughout the galaxy. Or if Ben Solo lived, though I guess his redemption counts as a “rise” as well maybe.

I think an opening phrase like, “Hope is alive!” would be a nice way to keep the vibe of “The dead speak!” but focus more on the ripple effect of Luke’s actions in the last film rather than revealing the Emperor has survived in the opening crawl.