The old relic steps get nerfed after some time, so they are not as much work as they used to be. Even some of the current expansion's steps have been nerfed.

You already get to skip some of the steps for the second relic like farming stormblood content and the 30 item quests, so this idea has already been taken into account.

You can do the heavensward relics in 24-48 hours so I don't think they need to make them easier than they already do.