Tim - what was your source for the squad number?
Looking at this
tour schedule, I find it pretty much unsuitable for 14 men. Even with rotation, some players would have to play an excessive amount within a 5-week period. McCullum for example would never 'keep for 30 days of cricket before the ODIs even start, and as soon as you talk about reserve 'keepers being required they've always taken squads of 16 in the past. I know Papps will be there, but even still.
Besides, it makes sense to take fringe players from a development point of view. Otherwise England may as well just give us one warm-up game and let our main squad rest at home for a while longer.
May
3-5 British Universities Fenners
7-10 Worcestershire New Road
13-16 Kent Canterbury
20-24 1st Test Lord's
28-31 Leicestershire Grace Road
June
3-7 2nd Test Headingley
10-14 3rd Test Trent Bridge
then...
16 Derbyshire Derby
18 D/N Essex Chelmsford
20 Northamptonshire Northampton
24 v England Old Trafford (day/night)
26 v West Indies Edgbaston
29 v England Durham (day/night)
July
3 v West Indies Cardiff
4 v England Bristol
8 v West Indies Rose Bowl
10 Final Lord's
11 Reserve day