As the title says.
The current system where you need 100% but even after running maps twice along the edges might only get 97,x% is very frustrating and unnecessary.
It is safe to assume that people who achieved 95+% went into every corner of the map and the missing % are related to how the map is revealed.
Spending so much time for exploration just to end up with 1-3% missing without any indication where is very painful.
The solution is simple - lower the threshold for gaining cards to 95%. Thank you for your time and consideration.