I like it
Though one problem on clarity.
If the attacker cleanly catches a bomb exactly on the line (and this is difficult to tell) is that classed as carrying over or catching after the line? Also if a pass is cleanly made in the in goal area by the attacking team is that a carryover or catching?
Sorry to be pedantic but invariably this question will arise.
Based on the wording I would say:
(1) Catching a bomb on (or just before) the line - all doubt prior to the bomb is BOTD to defensive team, but BOTD on the grounding (if that is the only doubt) would be BOTD to the attacking team.
(2) Is super rare, because normally when the attacking team has crossed the line they just ground it rather than pass, but I would say BOTD to the attacking team because the ball was carried rather than kicked across the line.