Could a fully armored battlecruiser be the halfway point between a battlecruiser and a fast battleship?
Short answerYes, within this classification, although the category has such a narrow British application that adding another formal label offers limited value.
NotesWithin this classification, a fully armored battlecruiser occupies an intermediate position between a battlecruiser and a fast battleship. G3 was already moving in that direction. Its narrow British application makes another universal category less useful.