Just a couple of things,  Your funds will continue to be held for all sales, until ebay are satisfied you do not pose a risk, this will  depend on your sales metrics.

You do not get to delay shipping items until your funds are released, you are required to meet your handling time once advised the item has been paid for.

Failing to meet your handling time, results in defects being applied to your sales metrics, which will lead to an increased time in meeting ebays standards and can also lead to higher sales fees and additional penalties.

Also  in addition to holds, ebay has recently introduced payment reserves, whereby sellers may be required to have either a set amount or set percentage held in reserve for 60 days