If we consider only the ODI format, then it can be said that Bangladesh is a strong team. And Bangladeshi players are consistently performing well in the ODI format now. And so Bangladesh can reach the semi-finals in the 2023 World Cup, if they can continue this streak. And I would say Tamim's decision is right. If he concentrates completely on the 50-over matches, we will get better performance from him in the World Cup.
Having serious trouble in t20i and Test formats but doing amazing job in ODI is surely good from them, but they need to go on grassroots for all formats which will give them better results and better quality players recently I was checking about Bangladesh domestic set up which is full of corruption and having no main authority which can handle things in positive way its surely big concern for them with political influence is also bringing bad impact now they have few good cricketers which can handle things at domestic level so better give them jobs and with work on all formats will be profitable and positive change in their game.
Recently their BPL is doing good job with having some good revenue, but they are not doing good things for overall cricket which is surely having the worst mindset for them in near future.