If we could sign only three players this summer mine would be Enrique, Sanchez and Young.
Now I would have said a CB was a priority but if we move Kelly to that position and promote Flannagan as Johnson's back-up that would leave us with;
Kelly
Agger
Skrtel
Carragher
Wilson
at CB (presuming we sell Kyrgiakos). That's not too bad if Kelly could stay injury free.
Left back is obviously a priority and Insua should be brought back IMO, but only as cover for Enrique. I'd keep hold of Aurelio just because when he is fit he can produce performances like last night. I'd bring back Aquilani and have Gerrard playing on the right or in the hole more often.
My 25 man squad would look like this:
Reina
Jones
Gulacsi
Johnson
Flannagan
Agger
Skrtel
Kelly
Carragher
Wilson
Enrique*
Aurelio
Insua
Gerrard
Sanchez*
Lucas
Aquilani
Meireles
Shelvey
Young*
Pacheco
Carroll
Suarez
Kuyt
Ngog
Three new signings but with the addition of Aquilani and Insua it would feel more like 5, without the outlay or bedding in periods that often come with new signings. This would also be a very adaptable squad with the likes of Kelly, Agger, Wilson, Carragher, Aurelio, Gerrard, Sanchez, Young, Aquilani, Meireles, Pacheco, Kuyt and Suarez all able to interchange poisitions quite freely.