My doubt is whether they will be able to cross the qualifying group. As they are showing now, it is not surprising if they cannot qualify for the World Cup. Nevertheless, Sri Lankan management is experienced. They have legendary players like Sangakkara, Malinga. They will probably advise the team to play T20 in the World Cup to play better.
In the end, the performance depends on the players and not on the coaching or the management staff. Some of the players have been in good form, such as Wanindu Hasaranga and Avishka Fernando. If they play together as a team, then under favorable ground conditions they should be able to defeat others. But if they get complacent, then it may not be even possible to move past the qualifying stage, as you have posted. And T20 is such an unpredictable format. There is a higher chance of upsets from associate nations.
