The good thing is they bought Moeen Ali but they already have Jaddu so going to play with two All-rounders? 
They might experiment Moeen Ali as the opener as he is a good striker of the ball and with Watson retiring he can take that spot and he is a useful spinner. Chris Morris got the highest big and he will be a good addition for RR and Glenn Maxwell goes to RCB and now they have AB de Villiers, Virat Kohli and Glenn Maxwell to strengthen the middle order and if they cannot win, not sure what changes they should make.