AND here we are.
The 3rd and 4th ranked Brewers for fWAR are Jace Peterson and Tyrone Taylor. Yes, the utility players.
The hitters having good years are not so valuable when you include their fielding and baserunning. Tellez, Renfroe, and Wong are all poster children for why the current roster construction (as you say) "makes no sense". We don't need 6 players (McCutcheon, Hiura, Tellez, Renfroe, Wong and Yelich) who are far better suited to be DH than to get regular reps in the field. You can probably tolerate Renfroe and Tellez if you had upgrades to LF, CF, 3B, and 2B, but with the current mess, the pitching won't be elite until there's multiple upgrades that includes far better defenders.