Ask HN: How to get good early feedback?

I am making a small project and it's still in the early stages. So when I ask for feedback in 1-on-1, I normally get the same feedback and I think if I scale it a bit about asking for feedback I won't get any new valuable things because people will focus on the same things and no see past it. Some of these issues will be solved in the future and some won't because there are good reasons, so on these 1-on-1 I have to basically explain this when they come up. So, how can I make people stop focusing on these and instead provide new feedback? Should I re-focus the message to be a bit more "defensive" about this and explain this up-front in beginning of the landing page? Should I just tell them before/while I explain the product? Should I just let the testers explain that they want the X feature that I have planned, tell them so and just continue to ask for more feedback?