Though they did in actuality specify that the Desert Pantheon ambience would be removed aloft the ceremony of your Premier Club subscription, and so they can't accept acknowledged arguments brought aloft them for abandoning purchased appurtenances afterwards due process or justification, it seems to me in all respects to be a afflictive and beatnik business convenance to acquiesce for barter to acquirement a authorization to acting agreeable such as this.
Though this array of accord is in actuality what purchasing associates to RuneScape is in the Acceding of Service, a player-character is a non-transferrable and capricious authorization to appoint in content, it is an accustomed business convenance - whereas acceptance players to acquirement apparent acting agreeable is advised not to be so.
With this accepting been said, all antecedent Premier Club bales (not by design, but as a aftereffect of their antecedent apathy with allegorical their intentions for the Dwarven Instinct Ambience to be temporary) accept accustomed the barter who purchased them admission to abiding content.
And, afterwards two years' annual of abiding auras accustomed to those who purchased the corresponding Premier Club packages, it seems like an disproportionate annual to al of a sudden crave the abecedarian to abandonment the ambience they purchased. (Regardless of their abilities, the blow of the agreeable is not revoked - so stipulating that the ambience should be the abandoned acting annual the abecedarian has to abandonment afterwards purchasing the amalgamation seems approximate and bottomless to me.)
A decidedly bigger band-aid all-embracing would be to absolution every Premier Club amalgamation (designed to cover an aura) with the compassionate that the ambience would abandoned action as advertised until the ceremony of player's Premier Club subscription.
After the Premier Club anniversary, the ambience should be rebalanced on the next bold amend to be bargain in efficiency, but not removed - for instance, giving abandoned 125 accuse per day instead of 250, or 100 per day with 250 accuse granted on the seventh weekday if the abecedarian logged in every day of that amend week. (Either way, you still accept bisected as abounding as before.)
The signs of activity adeptness be overpowered, sure, but that should accept been something which was accounted for able-bodied afore the artefact was placed for auction to consumers. Bags of players accept in actuality benefitted from the assurance of activity benefits - and they should, they paid for them - but the accomplishments fabricated accessible by application them will adequate not be revoked or displace afterwards the ambience is deactivated. (If a abecedarian acclimated the three signs of activity to get to 3000%+ enrage Telos, they will still accumulate that adeptness afterwards the bold amend which deactivates the ambience even if they could never carbon the adeptness afterwards the support.)
Initial bang-up releases, then, could anticipate players from application the Ward of Ichthlarin and Backbone of Het buffs in their encounters for the aboriginal two weeks afterward the release of RuneScape Gold, in adjustment to ensure that those with an aged annual do not accept an advantage at new agreeable in actuality because of their bequest cable status.
TL;DR: Do not abolish Premier Club auras afterwards a player's cable anniversary, but instead architecture them with a adaptation counterbalanced for abiding use afterwards the Premier Club year has ended, and alter the aboriginal ambience with the counterbalanced version on the next accessible bold update.