IMO England are on the fore-front in International cricket as far as quality fast bowling resources are concerned. While their pace battery has done exceedingly well in swinging home conditions, they have also shown what they are capable of by winning 2010-11 Ashes series Down Under.
In sub-continental conditions, their ability to adapt will be called for and this is where I think they need bowlers who can get the ball to reverse swing once it gets older in abrasive surfaces. Anderson and Broad did get enough reverse-swing against South Africa in CWC'11 league match in Chennai this year en route to famous victory defending a small total. Bresnan also showed capability to reverse the old white ball to get 5-for against India in Bangalore in another league match in CWC'11.
So the English faster men certainly have the skill set to get the ball to reverse in hot and humid sub-continental conditions. Also they have good bench-strength as far as fast bowling in longer and shorter format is concerned taking injury, form and rotation into consideration.
But the wonderful bowling combination of 3-4 fast men with Swann as the specialist spinner can come apart if Swann gets injured or doesn't get purchase as it has happened in recent past. It gets covered up when your fast men fetch you wickets, but what if on an unresponsive middle-east conditions, your faster men are exhasuted due to heat/ don't get reverse swing going ? And this situation can pop-up at any moment against any opposition at any condition. They just haven't had a quality spin-bowling back up in test matches.
I hope the English selectors are looking into this problem.For a test line-up which has had all the bases covered, this remains a gray area. They also need to look for a capable wicket-keeper batsman to be Prior's under-study in test matches.
Over the last season, England as a team have shown all over the world how to play quality test match cricket and I hope nothing less from them in their forth-coming sojourn to middle-east and sub-continent.