Without conceal you do not get the +2 to cover save BUT with the baron you do get +1 (bringing your jink up to a 4+ cover save) and the hit and run bonuses.
The Farseers are still granting you fortune (re-rolling failed saves) so is the pseudo-council a good deal? It has many of the offensive benefits of the Seer-star but instead of the dreaded re-rollable 3+/2+ cover save, you have a re-rollable 3+/4+ cover save.
Friendly but still deadly for the points? A good buy and still keep tables from flipping?
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my understanding of the seer-start comes from reading this at Front Line Gaming:
http://www.frontlinegaming.org/2013/08/29/tactica-eldar-seer-council-on-jetbikes/