Though neutral, 'mutable' can imply weakness in characters when flexibility goes too far. His mutable nature makes him an easy target for peer pressure.
Pro Tip 2/3
Not Always Positive
'Mutable' doesn't always mean improvement; changes can be for worse. The mutable regulations often lead to confusion rather than clarity.
Pro Tip 3/3
Broader Context
Use 'mutable' to describe non-physical things like ideas or plans that can change. Our strategy is mutable; we can adapt it as the project develops.