That's really what I worry about... that they're going to implement enforcement to curb some abuses, but because enforcement is not a "fine instrument" it will also prevent some uses of the Dining Plan that were previously okay, like having lunch at 11AM and dinner at 3PM (just for example). Short of installing finger scanners in each restaurant (and splitting Dining Plan credits onto each room key), I'm not sure how else they can enforce the non-transferability of the Dining Plan without applying arbitrary time limits like that, though.
I would think that for now Disney would wait an analyze the use this year after these changes are implemented. Most of the abuse seemed to be from the child / adult credit issue and treating people not on the dinning plan. Separating credits and not allowing a group to use more credits in a single siting than on the card would solve most problems and really don't impact people that are using the plan the way they intended. This appears to be the least intrusive way to solve these two problems.
I would think the legitimate use of ordering more TS meals in a sitting than on your card is almost non existent. That is about the only situation where the changes could affect people using the plan honestly, those people that order two meals for themselves in a single sitting or order an extra meal to split between the group. But I do think that use is almost non existent and collateral damage that most people could live with.