Even after you recover that wallet and disable 2FA, it will still be a 2-of-3 multisig wallet. You will pay more in transaction fees because you require 2 signatures to move your funds if you keep using it. Create a new standard wallet instead and move all your coins there.
You are right, only 2 signatures are needed for signing on 2-of-3 multisig wallet, but three public keys will count for transaction fee, not the number of signers are counting for transaction fee but the numbers of keys generated for the multisig wallet, which means the total (3) public keys will count for fee while only 2 for signing.
when OP can restore from seed and disabled 2fa, no additional fee is needed, the fee back to normal (mining fee only).
This is not the fee deducted by TrustedCoin, yes the fee deduction by TrustedCoin will be disabled. But the fee duducted will be high which is also normal transaction (miner's) fee needed for 2-of-3 multisig transaction which is higher than transaction fee on wallets with one master key.