You are right that Pakistan success depends on their confidence as they are talented but mostly inconsistent team. India team is indeed very balanced and strong with history of great performances and recent World Cup win. But Rohit Sharma has retired from T20 cricket India still has plenty of high quality players. As for Sri Lanka their recent struggles show they are in rebuilding phase and Bangladesh uphill battle to compete at highest level due to their lower ranking. And good analysis you captured key strengths and weaknesses of these four teams.