Now, however, I might semi-agree with you.
Holy Paladins can generate HP using CS...but on counter-point, they also allow us to cast free, instant Exorcisms or chain cast it at a low cost.
We can Judge and hit things (with our Seal of Insight) for mana...but we could do this in the past (though now, SoI combines Light and Wis for mana and health, making it more useful.)
And with HR working the way it does...
So overall, I'd say you're partially right. Bliz does seem to be moving in the direction of making Paladins "front line" healers.
But I don't think you're right to tell the OP that he's playing wrong.
While Bliz IS making a change IN THAT DIRECTION, the Paladin is still entirely competent at healing from 10-40 yards away. This indicate that Bliz is okay with us being mid-range to long-range healers (remember - Beacon and the "bounce" effect both have a 60 yard range. The longest range of ANY healer's ability in the game. You can, from 60 yards away, cast Beacon on a player/tank and then cast a heal on yourself to heal THEM.)
I think Bliz just wanted to give all those people clamoring for "melee healer!" tools to play that way more if they want. A healer is, however, almost always safer FARTHER away from the baddies. It gives more reaction time, more room to maneuver, more time to react, and gives tanks more time to get things off the healer (if the baddie is running 30 yards TO the healer, they aren't already sitting there beating ON the healer. Not to mention it makes it easier to see if someone's after the healer when a mob suddenly runs off. A mob just turning in place is easier to miss.)
But this doesn't make Paladins melee healers by requirement or intent. If Bliz DID want us to be melee healers...
...then we'd have all kinds of abilities that do heal when we hit enemies. Currently, there's the debuff from Judgement. That's it. And the HP generated by CS (or from the damage component of HS, though that has a 20 yard range) could be seen as a "melee healing" thing.
But no, wait for an energy based monk healing class (hint: there will probably never be one) for your melee healer. Or, possibly, some future variation of Resto Shaman. o.O