So the polar opposite of what I want to do at this point
The DPP changes are most significant for the rookies. Basically if rookies line up in other positions they'll get the DPP, so really your planning should be about how you'll take advantage of that.
Daicos by the sound of it is going to get DEF for example, so you'll almost certainly want him to switch back, I imagine he's going to be in the last upgrades group given he should score very well in that role if it sticks. Means your starting rookies down back can be quicker cash grabs with the idea of moving them off earlier instead of the stagnant slow grind types that normally stick around as back rookies.
Really not a lot of point putting too much time into this until the games roll around, every kid is the greatest thing in intra-clubs but it's the real stuff that matters!