Me being a neuty and alot of others sided aswell are probably getting annoyed with having to hold a bag full of garden and sanc keys just to get around SL. If i had all the keys i'd actually need more then 1 bag full. Specially with an inventory that just turns up to be a mess after every damn week i keep losing my keys, oftenly putting a key into the damn bank! So,
Make Sanctuary keys work on regular garden statues, and(or)!
Let us infuse our new keys with the power of the old, for example.
The key to the Garden of Thrak + The key to the Garden of Shere = The key to the Garden of Shere - Infused.
The key to the Garden of Shere - Infused. + The key to the Garden of Roch = The key to the Garden of Roch - Infused.
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The key to Shere's Sanctuary + The key to Roch's Sanctuary = The key to Roch's Sanctuary - Infused.
The key to Roch's Sanctuary - Infused. + The Key to Dalja's Sanctuary = The Key to Dalja's Sanctuary - Infused.
This way you will not be able to skip ely/scheol/ado/pen keys just grab an inf key and be able to access all because you'll need all the lower keys to upgrade your inf key. This shouldn't be hard to implement and makes it easier for us lazy people to get through SL.
Don't see a downside to this, for some weird reason don't like the combined keys? then simply don't combine em.
EDIT: Ofcourse im just suggesting this because i actually did just get stuck somewhere with my garden key in the bank and sanc key on my char not being able to return into the garden, having to walk a mile... on a lowbie... with low runspeed .