Yes, of course. The League and Europa should take priority, but I think that we have the necessary depth (especially now that Pogba and Rashford have returned) to compete in all fronts. After all, the players have had a nice three-month break, there are 5 subs allowed, they should be able to handle this.
I don't think that there is an asterisk for the cup or the league, or European competitions. It is different scheduling, but no asterisks in my book. Unless we are talking with the Scousers, in which case, obviously, their title is worthless and should be counted negatively.
If the entire point of the thread was to put an asterisk to Liverpool's trophy, then absolutely right, fair is fair.