This is historically something that has been denied in the past, and I don't anticipate it being a thing in the future, but I had a few ideas mulling around and I wanted to put digital pen to paper before heading to bed.
A new system to pass down relics to family, friends or promising proteges when giving up the adventuring life. Pass down your trusty blade to your son - bestow the symbol of your forebears upon your protege to honor them before you leave this life for the next. Let Tuerney come back and let the Grimoire of Ineffable Madness and the Long Arm of the Law reign on after he is gone.
A total of three (3) artefact powers may be handed down when an adventurer retires, spread across a maximum of three items (minimum one). An artefact weapon, while not possessing powers, counts as one "power" for the purposes of this, as does artefact armour. Paragons slotted into armour similarly count as powers, so passing down a suit of armour would allow a maximum combination of two paragons and/or powers vested in the armour, leaving one, two or three empty paragon slots. In addition, due to their nature, a unique/semi-unique auction item counts as one power by itself, regardless of not having any transferrable characteristics via the ARTEFACT POWER TRANSFER commands.
Powers/items transferred in this matter have their values stripped (This artefact has no value). They cannot be customized past what was already on them (these are family heirlooms to be handed down with purpose, not a way to get cheap artefacts). The previous value of the item/powers do -not- count towards retirement any longer. They may be passed down further, still following the above properties. This is also not a way to transfer an artefact to your newly created retiree alt: anyone caught attempting to use this system to bypass retirement to give their new character more artefacts to start will be permanently shrubbed, as will anyone assisting them.
EDIT: This isn't 100% complete, but since it's likely never to happen it's good enough for hypothetical discussion.