No, it's not even close to prenerf EF.
The problem with exceedingly long duration hots, is that they are also proportionally easier to snipe. Chances are, if you cast post-nerf EF on something, only the first or second tick is going to go through. Then you get a million and one heals from other healers swooping in on your EF-ed target.
Also why I tried to push for EF being a short-moderate duration hot at 12 seconds(while also applying a hot with LoD), but with a stronger ticking amount, so we wouldn't get sniped as hard with it. Although in hindsight, we probably needed the duration and magnitude to be further compressed in a shorter time frame to be viable as a talent choice.
6 seconds just like, EoL of Holy Priests with say, ticking for a base of 25k per 2 seconds might help the overheal situation.