Fix struct immutability issues when using options/actions

For overloads which take an Action<T> where T is an options block, T must be a class because structs are immutable and end up creating a coopy instead of using the set values.

There be another work around other than making all a class, but complexity and performance should be considered to make it worth not using basic classes here. If there is an adequate, alternative solution a subsequent commit can be made.