There are many potential issues that we would need to resolve for this idea to be viable.
PI System Explorer is a client software therefore each user has his own settings. Therefore any setting for custom sorting would not translate between users. If there are numerous attributes, depending on the individual use case, it would be very labor intensive to mark these attributes for sorting, e.g. 150 attributes.
It's uncertain if this idea would be viable and usable across our user base. Therefore, we currently do not plan on implementing this idea.