Simply put, any system that penalizes people that ground out all of their epic destinies for doing so is a complete failure. When they first added TR'ing, everyone had the exact same amount of level 20 experience. No one had spent 10's or 100's of hours grinding quests just for xp at the cap. They may have raided, gotten gear, etc, but no one had gone through that insane grind. So everyone was on equal footing going in to the new system.
Now a new system is being proposed where NOT working toward improving your character is rewarded by proxy. If you have a toon that's capped 1 epic destiny and hit level 28 they lose NOTHING but starting a TR to TR. Take another character that's capped 11 epic destinies and hit level 28 and they lose nearly 20 million xp. That's punitive and feels like Turbine is out to punish their more active players.
Personally I will not spend a dime on this because I'd rather have a level 28, maxed ED toon with whatever past lives I have at the time than to EVER go through the epic destiny grind again. I've worked my butt off over the last several weeks to cap 1 toon's ED's and was planning on doing the same on my sorc. You'd have to cut the ED grind to about 10% of what it is right now for me to EVER consider doing it again. So basically you've taken someone that might have TR'd several times after the next update to try out different builds and locked me out of doing so. I'll make sure I'm on the build I want and then I'll stay there. Most likely I'll be capped...I'll get bored...and I'll leave. The ED system that you designed is not fun. Rather than accepting that and looking for a way to make it more enjoyable you've doubled down on it and created even more grind.