No, you are right, they have not.
It's rather strange to me that posters insist that the palace is waiting for H&M to confirm. Since when has the palace ever cared what H&M want or say? The palace have been sticklers for rules when it concerns H&M. Stripping them of all sorts etc. They have also been sticklers with rules regarding titles etc. for C&C and W&K.
The rules should be that A&L are prince/princess. That is that. The palace should make that change accordingly. H&M can take whatever time they need - months, years etc. sort out whatever they want. The rules are the rules A&L are HRH and it should be reflected as such, till it is changed (most likely to say, they have the titles, but will not be using them, or some such).
H&M have blacked out their site and cancelled everything at this time of grieving, so I don't think they are really concentrating on that till after the funeral.
We will mostly come back to this story after everything.
My thoughts are that the rules have been quietly changed, or in the process and Charles is just waiting for his Coronation and there will be no going back then. The whole world is looking at UK at this moment with dignitaries etc. coming for the funeral (hence the slow down on H&M attacks, just like during the wedding ).
When all is done, it will be back to normal.........vileness towards Harry and his family.