Was hoping I could get a discussion on the use of the Testudo formation in Hail Caesar. At first glance, the use of the formation doesn't seem to have any real drawbacks. This could result in mass formations of Romans using it to march across an open field while closing with another enemy army, which seems a bit silly. So I'm looking for ideas on how to punish anyone who tries to pull such a stunt using the rules of the game to do so.
The one obvious drawback to the Testudo formation is the inability to shoot. But since units with the formation are typically limited to short range attacks only, this doesn't seem to be all that much of a disadvantage. By the time you're close enough to shoot, you're also close enough to charge into contact.
The less obvious drawback involves the inability to support a unit in Testudo formation. But the rules for the formation indicate that a unit in Testudo formation shifts to Battle Line when it is engaged. My reading of that rule is that you decide which units are part of the engagment (i.e. the units in contact plus supporting units) before converting the Testudo formation to a Battle Line, which means that a unit in Testudo formation that makes contact with the enemy will always be unsupported during the first round of combat.

