I'm in the significant minority, but I think I would prefer FSG saved my club and gave them a chance of getting back to closer to where they should be, instead of having them fall further down the table without the infusion of cash they desperately need to stay afloat.
I don't know if FSG will be better than other options, but generally as far as owners, they've been alright. Certainly a lot worse. I think there's a way to develop a relationship that helps both clubs, though admittedly, it is driven to help FSG in this.
For FSG, they want to use their data, training and methods to improve both clubs, though admittedly for the ultimate goal to develop value in both clubs. For Liverpool, that's getting a chance to play talented young players who aren't getting match time. For Bourdeaux, it's likely less beneficial, but Liverpool would provide them with solid young talent and a good brand of football. It also makes some sense to share scouting, data and analytical elements on a broader span, if you're already spending on it.