There was a recent Guardian article discussion exactly that, +Paul Flannery
Here it is: http://www.guardian.co.uk/football/blog/2013/may/05/liverpool-everton-phillipe-coutinho
The article says it better than I can, so here's the relevant bit:
"Rodgers is big on the importance of coaching and Henderson's and Downing's double renaissance represents an impressive endorsement of his skill in this department. Significantly, their revivals also indicate a new-found willingness to compromise on the part of a manager who, at Swansea, was so slavishly addicted to a carefully choreographed, short-passing possession game that you initially wondered whether Gerrard would have a place in his Merseyside blueprint.
The way Liverpool now punctuate an already varied passing range with some accurate long deliveries of the sort that would warm Sam Allardyce's heart suggests Rodgers has learnt to value pragmatism. This flexibility suits Henderson and Downing while offering Coutinho and – when not suspended – Luis Suárez a suitable framework on which to construct their personal challenges to Manchester's and London's finest."
Shows that BR is working with what he has got. In Gerrard, Downing, Hendo - he has some great long-ball players. If I can take anything away from the derby over the weekend, is that he seems to be coaching the players to pick their moments to play the long ball.
And if they keep the long passes low, then a big man presence isn't as important.
Of course, if they can somehow clone Drogba, then all bets are off. :)