Gazza M I think he has a few more gears to unlock in a system like ours
Yeah, I think this is the key to the synthesis here. @Qwiss (and myself for what it's worth) is right, Rice isn't the best use of funds and comes across more as a "Captain Courageous" than a world class player, but also he's got a brilliant engine, the elan to get involved in everything and the grit to cover defensively, but also he probably could manage pass and move around the area at a high level if that was his role.
One issue we have with midfield at present is that Partey's very particular set of skills lends itself to an overall specialisation. We benefit from it right up until we don't. Rice would represent a step away from that, boosting the overall energy hugely without outstanding attributes or deficiencies.
Let's say we somehow got both Rice and Caicedo, we'd be working for months to figure out how they best played together, but we wouldn't be lacking for effort or raw ability.