That's pretty much a given. I mean what's the point of switching them if they each end up doing the same thing? I already have some ideas about how alt-ANH might go differently, but the inciting incident kinda needs to be the same; meaning Luke still needs to send R2 down to Kenobi with the plans, and Leia would still need to find part of the message that sets her off on her Hero's Journey. To my way of thinking the waves of change should start small then propagate outwards. Meaning ANH would largely play out the same in terms of the broad gestures, while tESB might be quite different, and RotJ might be all but unrecognisable. Keeping in mind of course that the Will of the Force is still going to be at work, whatever choices are made. Yeah, like I said it wouldn't be very interesting if you just recast Leia as a female version of Luke & visa-versa. These characters are who they are, no matter where they're brought up. There is some potential in something like that idea; which is more about extrapolating that brief time between the third & fourth drafts when Lucas considered making "Luke" a teenage girl (which still survives in certain pieces of concept art.) I don't recall what his ideas were regarding the "Leia" character in that incarnation; whether she's replaced by a male version, or simply removed altogether in favour of the McGuffin (though I'd say keeping them both girls is interesting, albeit a little too progressive for the time.) Honestly I think the flirtation with the concept was so brief, he may not have thought it though that far before just switching back. Either way, that's a whole different thought experiment.