FFS What’s wrong with playing Smith?!!
Indeed - it seems to make most sense to try build around Smith in the attacking part of the field, as Obika continues to mis-fire.
IF KR is stuck on the one-up plan, then give Smith time and games to learn how to play the role (or learn whether he can do it), otherwise that leaves either Obika struggling on as he is, promoting Bradbury (as he seems built for the role but inexperienced), or pushing one of our spare centre-backs up there (Elliott-style) and play off him.
Alternatively, a change of formation to play two up, gives Smith and/or Obika the chance to play with someone which may help take the pressure off them. It also increases the options of who we play up there as we can pair any one of 4 or 5 of our slighter, nippier attacking mids as the second striker - Henry, Browne, Whyte, Napa, even Lopes if it comes to it, with two others flitting around.
The only reason to bring someone in now is to either own the one-up striker position, as we have plenty of options already if we are going to play two-up. Someone who can only play ten-minute cameos is not going to own any position, so it does seem pointless bringing this guy in, unless they are ready to go the full 90....