Just checked the thread in the Partners forum where this was discussed. Frankly, the reasons given by Inmortal and others opposed to idea are very weak. I'll list some of them and comment on them
This makes no sense to me. Seems to be hating on it just because it's popular, even though there's no drawbacks to it, only advantages. And how are hotkeys even comparable to items?
Because it make the game more generic like the games that have the same Dota items
It would be super confusing for all heroes to share the same lined up hotkeys instead of having to position your hand in different and sometimes uncomfortable positions for every different hero? Again, makes no sense.
it would be super confusing for all of them to change
Changing all hotkeys to be same involves just a few minimal changes to every hero in the editor. It would take 30 minutes at most.
I think it would be a waste of Inmortal's time. It would take forever
As offensive as this sounds, they come off as elitists afraid of change. Pretty disappointing to see. I'm willing to bet that the vast majority of players would welcome this change, but the stubbornness of Inmortal and high-ranking partners blinds them.