If nothing else happened and the user was recreated, all should be as before.
If stuff happened in between, say, deadlines causing agent re-evaluations, or new work items that were supposed to have gone to that user and nobody else, then those will be orphaned.
Use transaction SWi2_ADM1 and SWI2_ADM2 to check for orphaned items. You / your WF admin should be using these regularly anyway.