Fair enough, if the 'Word of God' says Tau shouldn't have Engagements, Tyranids shouldn't have transports, etc, then we really have an impasse.
Jervis has wrote an amazing ruleset of a wargame...but 'what has he done for me lately'.
Your god has deserted you, join the dark side and use your own initiative

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Tau without Fire Warriors dominating firefights, just ain't Tau to me. Getting an extra blast marker for Crossfire just isn't as useful as Engagements. Dancing around the opposing army without ever initiating Engagements (and lacking the Guards sheer firepower) means Tau are pretty weak, they can never achieve a 'killing blow' to a formation.
Can we have a thread with Jervis' Commandments, so we know what page we're all on? So if we submit an idea to TacComms we know it isn't dead in the water before it's suggested?