It's not size that matters, its how you use it. Granted I'd prefer it to be longer but I could say that about a lot of things
If Dodge was increased to 2", then the unit could spread out more and reduce the number of gang-ups against them, but even at 1" it pulls you out of base-to-base.
Dodge really only works if you're conducting the combat on a model by model basis, i.e. if your opponent has two models in B2B and doesn't gang-up then you can Dodge the first attack moving out of B2B with the second model and preventing it from attacking.
Pile-in moves are only made if the models aren't already in B2B, so a 6 strong Varbres unit can weather the punishment on two sacrificial models and then counter with the remaining 4.