these got a lot of attention when yama contracts were revealed, but i havent seen anything since. gnomonkey made a video on this subject here: https://www.youtube.com/watch?v=yP8IB3_IsSc
and goblin shared some of his thoughts here: #game-update message
imo, awakened bosses are some of the most fun bosses in the game, and i would be playing osrs every day if i could fight them as much as i want. i did my first awakened vard kill with ~600k in gear & brews, and i got 28 iron ore as loot. even if i sold all my gear, after drinking my brews, and loot, i wouldnt be able to afford 1 more orb to fight him again.
once solution I've heard proposed is to make them always drop 1 orb on kill. that was tried with yama and wasn't received very well. another solution, was to make the blood ornament kit into an echo orb. as far as I know, this was the solution being considered by jagex. it's a good solution IMO.
personally, i would suggest making it each individual boss instead. i don't have any intent to do the other bosses rn, i just want to do awakened vard. and i cant even check how many orbs I used because the scoreboard doesn't appear. i think that should be changed.
if u get 1 kc at any awakened boss, i think u should be able to repeat the fight infinitely.
another solution I've thought of is to make every boss drop 2 orbs instead of 1, which was tried with yama. that would let u farm it in regular gear to stockpile orbs for challenge runs, even on an iron. i would be interested in hearing irons' thoughts on how else that solution might positively or negatively impact things.
im not sure how this would affect the economy. if u have over 50% win rate, u could farm the bosses for orbs, from less than 1 per hour with 51% win rate to nearly 10 per hour with 100%. someone else can weigh in how that would affect the economy.
i think the echo orb sanguine kit is the best solution tho, especially if its done with each individual boss in mind and the scoreboard is changed. i would personally be fine even if it was all bosses, that would make the sanguine kit a cool unlock to go for even when u dont have torva.