It will be very positive for learning groups. It always sad to see that one idiot leave when you feel like you are making progress and just might make it. The echo buff will be some small incentive for people to stick with the group, or so I hope.
If it wasn't so hard for me to find groups that both can both a) get to post heart titanX and b) survive longer than 10 seconds, I might be slightly disappointed, but its at the point now where I have lost motivation to keep spamming groups in hopes that it will stay together long enough to make progress.
Don't really understand people against this. Overgearing content is no less challenge destroying. I guess everyone is downing titan EX in ilvl 67 huh...