I'm not too sure how well "bloodied" as half hit points works when you start reducing hit point numbers back to pre 4e levels as they seem to be doing. In 4e it is as much a marker point (to say you're halfway there) as it is a condition that powers and abilities can feed off of. A reduced number of hit points plays havoc with the suitability of "bloodied" as a halfway point. Perhaps it should be a condition you get when you hit zero hps that does not go away until you have some sort of significant rest. Rather than being automatically "unconscious", perhaps you should be automatically "bloodied" (with the possibility of being "incapacitated" or "unconscious" as well)?
The big problem for me with bloodied and hit points in general is that they are putting "wounds" AND "everything else hit points represent - fortitude, luck, will to go on, divine providence, inner strength, bumps and bruises" under the same hit point umbrella when realistically, the two should be separated. Wounds are healed differently to how hit points are restored and the recovery process for each should be separated. Hit point recovery should be possible through second winds, warlord/bard encouragement/chastisement, fighter inner strength, paladin heroics as well as clerical blessings and so on. Wounds need a healer during an extended rest be that healer mundane or magical.
While I struggle to see 5e designers dealing with this hit point duality thing in the core game, I certainly hope they try to fix it in a module or something.
Best Regards
Herremann the Wise