I stoped reading further the second you said "why tanks must be gimped by locking gear on t9"...

EVERY CLASS has loot there. You're not a special snowflake. Many still want their pants/armor/weapons from t9 for glamour purpose, so don't say only tank loot drops there and you are gimped because nobody that has access to FCoB wants to try t9 again. If you have FCoB unlocked, do yourself a favor and do that instead of trying to get old gear. Who knows how much longer will it be before nobody else does the last turns.