Astrongcow, a few requests before I provide feedback.
1. Please log-out in your Resto spec and equipment set.
2. Briefly describe your preferred healing approach. Is your preference for AoE or single target healing. If you significantly change your approach based on an encounter, describe your approach for the three encounters for which you provided logs.
3. What past experience do you have being a healer in a raid environment?
A quick comment. Your team appears to be over-healing the encounters based on the overall over-healing numbers and the sheer HPS of your healing team. My team tends to over-heal most encounters as well.
All the Best — Mahlaa