What is your suggestion?: When the runecraft cape (max cape/monkey) is equipped, it will act as a substitute to all runecraft talismans and tiaras, allowing access to all runic altars by equipping the cape.
Is this in OSRS?: Yes, https://oldschool.runescape.wiki/w/Runecraft_cape
Has this suggestion been accepted already?: No
How would this benefit Alora?: With the introduction of the Guardians of the Rift minigame, the new "true" blood altar has been introduced into the game. To access to the altar, you need the blood talisman or the catalytic talisman which are earned through the new minigame, meaning that the content is currently locked behind it.
If this cape perk was added, it would circumvent the need to do this minigame to access the altar. My initial thought when coming up with this suggestion is that it would make the minigame 'dead content,' but since there are other useful rewards (Raiments of the Eye outift, abyssal needle for colossal pouch, intricate pouch, etc.), this wouldn't be the case. However, I can see the argument that this perk would make that specific reward 'dead content' for higher XP gamemodes.
Regardless, adding this perk would be very beneficial for those who don't necessarily want to do the minigame, or for those who are already maxed/comped and want to craft blood runes efficiently.
Once again, this is a suggestion that I had trouble deciding whether it was overpowered or not. I'm open to hearing what other people think about it, so don't hesitate to give feedback if you like.