Hello, I would like to share the ideas I have had about the DLCs, to try to enrich the game as much as possible. I hope that ideas like you:
More docks spaces. Buy a DLC give you an extra dock space.
Unlimited painting. As a untradeable ship, redem a paint for a DLC don't block your DLC painter with the 24 hours countdown. Probably a change in painter DLC would be a good idea, adding a button for importing DLCs paints, and other button for the rest. Paints would be still as untradeble items.
Imported and crafteable ship. Every 24 hours you can redem the imported ship like always, but you have it available, in adition, in your shipyard ship list for craft it like any ship; of course you need the materials and doubs for this last option. You can only have one on them, imported or crafted, in docks, no changes in this rule.
Change in countdown. Remove the 24 hours of countdown for reedem it, and reset it after the daily maintenance server time. This could be a good idea too for painting DLC.
Some ideas are wellcome.
Despe loves you