I'm not sure they have prepared well enough for the World Cup - also players may have some fatigue. Its been a hectic 12 months for the majority that has included the t20 WC, IPL, 5 Ashes Tests in the space of 8 weeks, August for Hundred then they tried some 50 over games but rain ruined some of that schedule.
They are not a bad side but just haven't got going. Yesterdays bowling and fielding performance was up there with some of the best this World Cup. This was a grafters wicket and they should of seen how Rohit, KL & Sky approached their innings.
I think this whole lets put pressure back on the bowlers sometimes takes away the lets play the situation (pitch, bowlers, run rate required etc) .