It is difficult for Bangladeshi players to perform regularly in IPL. Especially for Bangladeshi batsmen. Because they are batting very slowly. And we see high scores in every match of IPL. Slow batting is very risky here. However, Kolkata will not suffer if Liton Das is added to their squad. In the last few T20 matches we have seen great batting from Lytton. He scored big and batted at a strike rate of over 150. Kolkata could have offered Liton as a replacement for Rahmanullah Gurbaz. I think Liton Das is a better option for Kolkata than Rahmanullah Gurbaz. Even in the last match, Rahmanullah Gurbaz did not play well. He returned to the dressing room without collecting any runs in 3 balls.
I don't think it's difficult to perform for a batter like Liton Kumar Das. He has been fantastic in his last couple of T20Is. If you compare his performance with Rahmanullah Gurbaz, Liton Kumar Das doing far better than Rahmanullah Gurbaz. Since the team management is satisfied with Rahmanullah's performance, it should be okay.
In Today's match, Rahmanullah failed to perform again. He scored 8 runs from 12 balls. Venkatesh Iyer showed an awesome batting performance today. But, look like it's not enough to win the match.