Mark my words, the days of free booze in LH Y are numbered. 12-24 months max. I have a feeling they will offer one free drink to silver and golds to help contain some of the backlash.
Food will possibly go the same way as short haul, removing and reducing meal options now allows them to give the same argument as they did for SH.
My (ever so slightly educated) guess is that they will not remove free food from LH, but will add a BoB M&S option to flights at the same time as further reducing the free options, think along the lines of heated panini, served in a pocket, not tray with salad/dessert. Hence, they are still "full service" but in reality the free option is so small/limited that you will want to buy an M&S sandwich to get you through a flight to the West Coast. To be fair, I think that if I were on a long haul in Y and was hungry the option to buy a sandwich or snack would be welcome.