Perhaps the best feature of using the tokens of the 12 to acquire TR hearts was the fact that you could pick them up on already capped and geared toons and pass them to a toon of your choice. You still spend the additional hours you want players to spend getting the materials for the heart, they just spend them on different toons so they don't have to run it on a toon why can't use all the gear they may have in their bank. Having to beat your head against epic content with a toon you just got to 20 in a life you did just for a past life feat (or on your way to completionist) is not fun. Getting the commendations in order to HR/IR/ER with a capped toon with full gear is going to be a lot more fun (or less painful) than grinding it out on a toon you never intended to play past 20.
I know token turn ins are going to be around FOR A LIMITED TIME after U20 and that commendations are going to be the only currency that will be used to buy hearts in the future. Don't throw away the most convenient feature of the current TR heart. Make Commendations of Valor BTA!