The striker situation is puzzling for me. I fear Robins has bought Chaplin to develop into a 10 given how deep he's played him most of the season.
Of the ones we have I feel Biamou would be best suited to 4-2-3-1 but he's unproven in L1 and coming back from a bad injury.
Bakayoko doesn't win enough headers, doesn't hold the ball up consistently and doesn't seem to play well isolated, which he is for long periods.
Hiwula is poor back to goal, not got the first touch or body strength to play as a lone striker and it would negate a lot of his strengths
Chaplin is not a 10 and too small to play up top on his own.
If Bright re-signs we have to get a different striker for 4-2-3-1 and if he doesn't re-sign we'd need a formation change, still need a new striker and then probably wingers too. Arguably needs a formation change at home anyway and then where does Bright fit in a more traditional 4-4-2? Can't see him working in a 2 man centre midfield, so probably still as 10 and then we are back to the same issue of who plays up front.
Can't see what the plan is right now so it will be interesting to see how things develop in the summer but I'd be surprised if all 4 were still here in August.