For site suspensions, initially, no reason was displayed, but following the arguments at Avoid the Streisand Effect - be clear about the reason when suspending an account, a brief reason for the suspension (e.g. "for rule violations", "for voting irregularities", "to cool down", etc.) is displayed.
But for network-wide suspensions, it just says
This account is temporarily suspended network-wide.
...without providing any brief reason for the suspension.
Why wasn't that request implemented for network-wide suspensions?
As far as I'm aware, network-wide suspensions are actually a series of site-wide suspensions applied by an automated script run by the SE team, with "network-wide" placed in the spot for the reason (which explains why it's possible for local moderators to unsuspend network-wide suspended users on the site they moderate). But is there a technical reason why the script can't add in a selection of text for the reason field, to show something like:
This account is temporarily suspended network-wide for rule violations.
...instead of just one set of text?