Am through to final round of interviews for a role that I quite like the look of. No red flags that I can see but it's a role that someone has left. The person has gone into a similar role elsewhere. If I were offered the role I would be leaving somewhere where I'm generally quite happy and well treated but want a new adventure. I'm hoping that it's the same reason that this person has left, but I also have nagging doubt. I've moved before from somewhere good to somewhere horrific and I don't want to make the same mistake. I wished then that I'd asked more questions of people already in the team. Since then I've only ever taken new roles, or roles that have been created for me.
Would it be really inappropriate to contact the outgoing role holder via LinkedIn and ask for their thoughts on the role? Really I'd just like to find out why they're leaving and if it's because of anything that is likely to also make my life a misery...