Sounds like you are tinkering with this for more than the known reasons
Negative healing came before DDO fell into the hands of SSG, however negative healing tech is still a rather curious tech to the development team (Not as much as runearm tech though in which SSG understands so little of that it would be impossible for them to allow half elf Dilettante for Artificer to grant runearm proficiency) to me this would appear to be indicative of programming tech development in the same sense that cloak tech was used in the development of tails for the Tieflings in which I called about a week after the cloaks were announced for DDO.
So I would guess that we are either going to eventually get a sort of "Infected" universal enhancement tree that would turn us into something undead, or the Sorcerer Iconic will indeed be an undead type as some rumors floating around and a snarky remark made on Lamannia has indicated as likely. Sure it would make sense seemingly that Sorcerers have all the spells essential for a Pale master's self heals (not to mention simply every spell that a Wizard has as well) despite some of said spells being useless without an undead form (Since Sorcerers have no undead form), this likeliness increases even further when SSG would hear people complain about their healing availability in reaper mode while other players simply despise the idea of an undead race as I've suggested in the past for the Ravenloft expansion. Tinkering with the negative healing tech to allow for positive healing makes quite a bit of sense for this purpose and for the purpose of making different loot more useful for different builds (Looking at you Sharn Armors). Then again the newest class they are to release may even be vampire in which honestly I don't really want to see represented as a class unless it would be free to play as a vampire iconic would be interesting to say the least, think Legacy Of Kain series!
Further speculation regarding iconics would reveal that based on popular opinions of the player base as well as D&D lore, the Iconic barbarian is in fact most likely to be a Duergar Battlerager.