Joining the Tau is prolly not a good long term goal. I know they
seem nice and fluffy but humans don't have much in the way (if any) when it comes to rights under the Tau, most being conscripted/'recruited' Gue'vesa and second class citizens. Better treatment is present on neutral worlds that don't care either way, but those are usually not part of the tau empire. In other ways the Tau are too
nice and naive to stand any chance against other factions military-wise without a
much greater tech advantage. The imperium is
enormous, the tau empire has only survived thus far due to the imperium being busy with more important things than dealing with 'Those upstart xenos on the other end of the galaxy.' Depending on when this is set the Tau may not even believe that the warp or Daemons exist, as they don't use warp drives except in more recent media. Yes humans are generally happier under Tau rule, but believe it or not, the current model of the imperium is more about resource production and survival than happiness. Also 10,000 years of war fatigue.
Would have been better off finding an unaffiliated human world or just dealing with the Mechanicus. Without the authority of the emperor any actual improvements to the imperium would take centuries if not millennia to make it through the labyrinthine bureaucratic nightmare of the current imperium so they are off the table if Paul wanted to make an impact within his lifespan, unless he got unrealistically lucky. Maybe working in the background with the harlequins or other such unaffiliated rogue agents that tend to be used to progress the plot of 40k.
Joining the space communist and using the low key emotional mind control to subvert their resources and set them in a cooperation mood is a fairly good idea, even more so when factions of the Eldar will inevitably contact him as well.
Zoat might be trying to show us that the ring can't detect whatever cloaking tech they use. The Tau are sorta already under emotional control because of the ethereals and whatever they use, pheremones or whatever. Dealing with the Eldar is usually a bad idea, as they are far less reasonable than would be in their best interests. They are intelligent, yes, but most of them are about as arrogant as you would expect hyper-intelligent space elves who once ruled the galaxy to be. That is, arrogant enough to ignore the stupid humans unless doing otherwise would result in eldar deaths.
Edit: Nvm is the stealers.
