We are talking about the same franchise that world-builds so effectively that there are whole wikis (wookies?) about things that are mentioned off-hand in dialogue that have crazy-deep backstories and remain consistent across movie, books, cartoons, comics, and other mediums, right? With such attention to detail this part seemed, well, just lazy to me.
I don't care that tie-fighters make noise in the vacuum of space, or that the fact that bacteria causes telekinesis and other magic is never explained. I am not looking to have every single thing easily explained.
That's part of fiction, period -- yet again, I very well get the concept of suspension of disbelief.
But there is an uncanny valley to this stuff. For example, where there is too convenient/frequent of a deus ex machina, or where unexplained abilities or happenstance is just too much.
And a guy being able to rebuild his ship from a veritable scrap heap to a working interstellar concern -- not once, but twice -- is just that kind of step over the line to me.
Unless his dad's got an awesome set of tools....