Allow users to choose how long their subscription will go. For example if someone wants to choose $5/month for 6 months, or maybe they want to choose $10/day for 3 months.
I see that I can make that decision for them but I would like them to be able to decide how long their subscription will last.

Sometimes, especially with forced sales/chained products or special situations the user may have a name your price item in their cart.

Ideally, it would be easily changeable and display the price.

Currently, on subscription products, naming your own price only defines the monthly fee, but cannot define the signup fee.

Make either nameable, with configuration about which (so one could be sliding scale and the other not, or both sliding scale, etc).

For payment adjustment and pay the difference of any returns and adding a new item in an order , needs an adjustment for the payment and customer needs to pay the difference , right now there is no way to adjust the payment in the same order that customer placed .

Display the input to name your price on the shop and category pages so the user doesn't have to go into the single product to "add" it to the cart

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Allow active subscribers to update their WooCommerce Pay-What-You-Want Subscriptions without having to cancel and resubscribe.
eg. User subscribes at $5.00/month but wants to increase to $10.00/month. Currently, there's no way to edit this without canceling and purchasing a new subscription.