Thank you for the detailed explanation.

It seems like Plasticity is having an easier time handling Chamfering then. For example, this is the result in MoI Beta version 5 (also occurs with Version 4) of selecting 4 edges and then Chamfering them. Below, is the result inside Plasticity, doing the same steps.




Here's another example, selecting arbitrarily 2 adjacent edges. Top images are the result of this operation in Plasticity and below, MoI3d.