To get the Distinction overall for that Unit, you need to achieve all of the criteria. However if you didn't get the D2 and didn't have time to resub, your teachers may predict you a distinction overall.
Well they'd take a lot of things into account like your classwork/work from last year and just generally what type of student you are. Also you'd probably get a Merit if you didn't get the resub because they're not allowed to give you the grade if you didn't meet the criteria. Also all work should of been submitted to BTEC like last week so i don't even think teachers are giving out resubs.