If a token isn´t added to the Ledger yet does it matter if I send it to the Ledger, only making the token visible with MyEtherWallet
Well, one my friend had problems with his ledger wallet after updating. He saw his portfolio, saw crypto on it but nothing helped to output coins on other wallet, except of Etherium. He easily managed to get ETH from that wallet because he opened ledger wallet in Metamask. So it’s very useful backdoor.