Gayle, Dwayne Bravo and Darren Bravo will make this WI side a lot more stronger and challenging to play against. They pushed us a lot in this ODI series (yes we missed Dhoni, Yuvraj, Zaheer and we still won 4-1 but they also missed Gayle and the two Bravo's). Rampaul and Roach make a really good combo. If a guy of Indian origin can bowl at such speeds consistently when playing for some other country, it certainly means the flaw is in our development system when it comes to fast bowlers not maintaining their speeds consistently and falling away.
Positives for us would be our youngsters. Even after the veterans retire, we will dominate consistently at home, and who knows with some experience, our youngsters can perform well abroad too.