The upcoming league games are more important than this for me so I would be fine with plenty of rotation. I'd be disappointed if we went out but I would also see it as a necessary sacrifice to improve our chances in the other two competitions.
I don't think there's any sense in risking the likes of Rodri, Bernardo or KDB because they could easily pick up an injury and even if they don't, they won't be able to play at full intensity and we'll just end up struggling like we did in the the second half yesterday and probably go out anyway. Then we'd be going in to a crucial game against Brighton with either a group of players who are shattered or a heavily rotated side that may lack cohesion.
Some may argue that we should put our best team out because we could easily finish the season empty handed but I'm not sure how much an FA Cup will soften the blow if Liverpool win the Premier League and Champions League. It sounds a bit dramatic to suggest that playing a strong team could jeopardize our chances in those two competitions but the margins are so fine now that the season could be won and lost on us drawing one game because of injury or tiredness.
Anyway, it's not like we aren't capable of beating Liverpool even if we make changes, that's the whole point of having a strong squad. Maybe if Liverpool are favourites for a change it might actually work against them.
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Cancelo-----Stones-----Laporte-----Ake
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Sterling--------------Jesus---------Grealish