CGC does not mark down for print lines. I have a perfect 10 with 3 print lines.
I would argue that modern English card grades seem to be inconsistent due to the unfortunate nature that the printing quality on English cards remains lackluster and overall poor. I wouldn't necessary pass the blame onto CGC. I think they are doing their best to maintain standards, with the cards they're given. I agree, submitting English cards is not ideal even if they appear near flawless by the naked eye. I do also agree more transparency is good, release margins and common flaws associated with English vs. Japanese etc. would be awesome and well received.