Seems like there are three general "wants" when it comes to melee support.
A melee defender with a better inherent. (Low damage, high suporr)
A melee variant of a corruptor with a better inherent (high damage, some support)
A heavy support variant of a tanker (high survival, some support) presumably this one overlaps with one of the others.
So it sounds like people who advocate the melee support idea really want at least 2 ATs not 1.
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I agree trying to make the inherent do everything will not work. No other AT does this.
Seems more reasonable that whatever melee support character comes out of these ideas should instead follow the Stalker's lead.
In that it should give up some support powers and some melee powers to balance the fact it will be a support character with mez protect and armor. Or a melee character with a lot of support.