The current design of the wire protocol makes it prohibitively difficult to implement features such as:

• Handling "not master" and "node is recovering" errors according to the SDAM spec
• Allow easy introduction of OP_MSG without difficult-to-test hacky patching
• Use the same methods (primarily command) for all cases where we are sending message over the wire
• Simplify implementation of the "Command Refactor" coming in FY2019Q1

This epic will track a number of small refactors needed to prepare us for an overhaul of the operation layer of the driver, as well as closing a class of bugs related to gaps in our SDAM implementation.