The Warp's necessary, I think..
.. in SFB, even if you just have a poor little impulse engine, you can do things called impulse TAC and such. A ship can turn and maneuver pretty fast, despite the fact its maximum speed is 1. Since SFC is a Real-time game, a speed 1 ship would not only be too slow to use, it also loses all and any advantages it may have had before.
ALSO..
These ships, The WB+ and the VUL+, they all have 1 thing in common: Plasma Rs. In fact, even in SFB, the PLaR can't be overloaded on the WB+ without a special trick with the batteries. This can't be done in SFC, so you can guess why it's so useful to have a bit more power to these ships. Of course, they also cost a bt more BPV for it.
This is why I would have to say these ships are made in "Taldren's style", and I want to preserve that style.
ie: The VUL+ is my addition (from module Y1), but is put together in a similar way to the WB+.
besides..
WB+ -> WE -> KE
VUL+ -> WVL --> KVL