I think it's really less about adding thrills/excitement and more about mitigating things that are boring. ie you don't replace something relatively mundane with something riskier, that's not the purpose.
Kind of like the ideas last offseason floated about removing kickoffs. The intent was to replace them with a 4th and goal at a distance that is converted roughly as commonly as an onside recovery, something like a 4th and 17. The goal was to remove a play from the game that disproportionately injuring players, rather than to change the excitement/whatever level.