Fisher's proposed 1880s refit and the evolution toward Renown

What did Fisher have in mind for the proposed 1880s refit discussed here?

The proposal is interpreted as a step toward Renown, followed by further evolution in Fisher's design ideas.

Fisher's proposed 1880s refit is interpreted as an early step toward Renown. It should not be treated as a finished version of all his later warship ideas. The explanation follows a sequence in which one design leads to the next as reading and further development alter the concept.