Bioware IMHO made the right call here.
It's been hard to be quickly weened off healing (I've played healing classes for a very, very long time, since DaoC, RIP Mythic) and to have to adapt to no longer having access to it has been difficult but oh so worth it.
While some feel Barrier is "Just the same" it totally isn't.
With Barrier, once it's on your party, you are now Freed to cast other things, something you absolutely couldn't do in games where you Heal and You Heal and You Heal because Barriers were balanced to take 1-2 hits at the most so you'd be stood healbotting, as a result "Support" Classes actually feel all the more useful, concentrating on more important things like Battlefield control with Crowd Control and even being able to output DPS.
As a result it makes every fight feel more interesting, every healing potion feel more sacred, every Dragon more threatening (In DA:O just bring Wynne and it's GG Dragon is going down) every time a comrade falls, you feel compelled to get them up, but you also find yourself in a moment of choice since your other companions still need you to carry on the fight.
It created a very unique, interesting and fun playstyle, even if this was just an experiment for a ME MMO or a future DA MMO, you guys got me sold on this mechanic alone.
Thank you for this Evolution, I honestly never thought we'd see an end to heal spamming but you guys pulled it off.
Edit: Just wanted to add, my last Dragon fight was rather nerve racking as it ended with No Potions left and everyone but my Inquisitor on Red HP Bars, I refuse to take Knight Enchanters or Reavers with me and won't solo it with a consta-stealth class as I feel it cheapens the experience.