Why would ET be restricted? that's like restricting gaara's sand defense. Plus ET seems to not matter, gaara can seal people with his sand burial provided he has the seals.
Well restricting a forbidden jutsu from orochimaru is definitely NOT like taking away Gaara's main form of attack/defense lmao. but i strongly agree with your second statement, guys Gaara has the sealing to make short work of most edos even at kage level.