To be brutally honest OP, I don't think any of us can answer your question with any accuracy.
You sound as if you have the figure for it, but that's not what you asked. Some 50 yr old women would absolutely slay in this outfit and look stunning. Others - despite being slim - would look awful in it, like they'd dressed up in something from their DD's wardrobe. And that's because whether it's ageing or not is really all about your personal style, and your overall look.
But in theory, there's absolutely no reason not to wear this. Not everyone will love this outfit, and that's fair enough. But if you're asking if it's a definitely no-go for a 50 yr old - absolutely not. I'm going to suggest that the fact you're even considering wearing it means you've got the style to pull it off without looking awkward. I'll bet you look amazing.
Sorry to add my vote to the pile but I really didn't like the shoes for this outfit either. I think with the outfit they are a little dated, because they're very matchy matchy. They're lovely shoes, just not with the playsuit imo, for the reasons you asked re being ageing.
But having said that, the shoes are "fine" even if they wouldn't be my choice. I honestly suspect you'll be turning heads in the outfit for all the right reasons and no one will even notice your feet! Enjoy.