As the leader, your team's development is your responsibility. In order to keep good people, you have to allow them the opportunity to improve themselves. You need to be aware of the different levels of testers there are in the team, the abilities each level of tester has, and what motivates every individual.
One-on-ones aren’t for status reports. They aren’t just for knowing all the projects. They are for feedback and coaching, and meta-feedback and meta-coaching, and for fine-tuning the organization. If you are a manager and you aren’t using one-on-ones, you are not using the most important management tool you have.