Feature Request: time-average of sampled surfaces

Greetings,

As far as I know, it's not possible to perform time-averaging on the sampled surfaces, similar to what the fieldAverage function does. In certain situations, a workaround is to use fieldAverage to calculate the time-averaged fields, followed by applying surfaces sampling to sample those fields (e.g, UMean, pMean, etc.).

However, in large 3D cases, it appears inefficient to compute the time-average fields solely to be used later for surface sampling, as it consumes a significant amount of computing resources. It would be more practical to have a direct method for computing the time-average of the sampled surfaces without the need to use fieldAverage as an intermediate step.

Best regards