Miami is averaging the highest EPA/Play per game and highest Offensive DVOA of all time through 3 weeks. Will they end the season with a historically top offense?

Finishing top 5 of team offenses all time on either of these two metrics would resolve to "Yes".

Expected Points Added/Play

https://rbsdm.com/stats/stats/

(Can replace with a better source, or one that goes back further)

Offensive DVOA

https://www.ftnfantasy.com/nfl/tools/offense-team-dvoa

Offensive Team DVOA - NFL Football Stats

See every NFL team's offensive DVOA (defense-adjusted value over average). DVOA helps identify the best offenses in the league using advanced analytics.

I would also entertain editing to add other proposed metrics that measure offensive efficiency (but will not add a new metric after NFL Week 12 for market integrity) that aren't redundant if suggested.