One of the big issues was probably that they received a lot of positive feedback with warrior's rework in 4.2 which lead them to the conclusion that this should be the design template for every tank. What SE obviously didn't keep in mind is that the rework wasn't some kind of holy grail of tank design but instead it was just a lot less of a mess than 4.0-4.1 warrior...the fact that it performed well dps-wise probably also contributed to the positive reception of the rework.
But since ShB boiled their warrior design down to it's very core you very quickly notice that the core is about as interesting as watching paint dry.
