Not for the first time, WI paid the price for their T20ish approach in ODI cricket. Hardly anyone sticks around in the middle.
Ye basically. This is a mental hurdle they need to overcome, because its obvious the team is talented across all area's.
One thing this series also showed is that in the future in the ODI set-up they need an extra bowler. Essentially in ODI's windies have 30 solid overs from Rampaul/Roach/Best/Holder (whichever 2 new-ball bowlers starts - usually Rampaul/Roach) plus Narine. Then they are hoping to get economical overs from Bravo/Sammy/Pollard/Samuels/Gayle.
You compare that to Pakistan team whose only bowling weak links this series was Riaz or Asad Ali - otherwise Pakistan had 40+ solid overs from Irfan/Junaid/Ajmal/Afridi/Hafeez.
West Indies need to play third potent quick bowler more often in Holder/Best or Russell if he regains some bowling form.
Also i think either Charles/Simmons wicket-keeping is a good long term idea. However i would let Simmons do the dual role, because i think he is more solid all-round/technical batsman than Charles as a opener/keeper.
So best ODI XI/squad:
Gayle, Simmons, Bravo, Samuels, Pollard, DW Bravo, Russell, Sammy, Narine, Rampaul, Roach
Charles, Sarwan/Deonarine, Best/Holder, Cooper/Shillingford.