I know you're saying the lord lack personality. You think this is because of the ageing feature, but I'm saying that the ageing feature has nothing to do with it whatsoever. Most of the lords in Warband were faceless goons, to be honest; Taleworlds has, to date, never given us better lords.
I think a lot of people have the wrong idea about ageing. They think it will lead to a rapid game where lords die every few hours before you get the chance to build a relationship, like in CK2.
But there are other games which include ageing and death, but use them to actually enhance the character of each lord, with Romance of the Three Kingdoms being very good at this.
Every hero in that game is a unique character, and as the first generation die, the second comes about with its own unique set of characters, many of them the sons of the first. It has defections, sworn brotherhood, rivalries that occur when your family or sworn brothers get killed etc.
So how would this look in Bannerlord? Every single starting lord has their own biography and personality (autogenerated biographies for generated characters, from their parents, friends, and personalities). Some of them are warriors, some are politicians, and others are bookish types. Each has a preference for the sort of gifts they would like to receive. You can "spend time" with lords, which passes the time, but boosts your relationship (during which time events might happen, like duels, debates, hunts, or various other scenes). You can give them gifts, or attempt to get them to defect through conversations, and where you fail such a conversation, you may suffer relations penalty (depends on their personality - how loyal they are to their lord and whether they're honourable or dishonourable), and have to seek an apology before being on friendly terms again (this is if they're angry with you). If you're in a close relationship they become a "close friend" who you can keep track of via your character screen, and upon their death, you will rival the ones responsible. Lords die, but not all that often.
It's not an exact translation, but that's closer to how I would like Bannerlord to do things. None of this is incompatible with ageing whatsoever, and so I think you're at risk of asking Bannerlord to remove a feature because they haven't included another. We are better asking that they keep the ageing feature, but ensure it is implemented in the right way, alongside deeper lord personalities and interactions. I mention RoTK because I think it is a much better model for Taleworlds to follow than CK2.