I'm against the aging/death/heir system all together only for the reason that I don't think they would get it right. Like I said above, I think it would lead to balancing problems among the factions and people would die too often and it would screw a lot of stuff up. I think you would end up with all the lords being dead and having a **** load of babies that can't do anything. If they can do and make it work, great. I just don't think they will be able too.
I've said this before elsewhere on this forum, I think Bannerlord is probably going to be a good game, but if it's not a good game, it will be because TW tried to do too much and the game will be over complicated and have features that either don't work, or do work, but aren't fun. I think the aging/death/heir system is one of those features that will either not work, or will work in some capacity but will be not fun and annoying.
For what its worth, the longer this game is in development the more I worry that TW is trying to do too much. Warbands was a REALLY REALLY good game and I think Bannerlords will be too. That being said, with no indication that this game is close to coming out, I am starting to worry that when this game is released it could be an over complicated mess.