I was sold at the sight of the pictures alone...
A few things though...Now you just have to work out how often they need to spawn in order to maintain the supply of a base. Isn't it every 15 minutes for a untouched base right now? Or is it 45? I keep forgetting.
If they have to spawn every 15 minutes, I see a potential problem on the server, but 45 may prove to be a problem as well (which the server is
rumored to be no where near suffering strain from current setup. Only HTC staff can comment on whether their servers are doing a-okay). It will have to generate and maintain the objects, not to mention the % of supplies based on the status of the strat associated to the convoy launched, as well as the convoy's status itself. What is a possible solution to this issue?
Will the status of a port or depot affect the supplies being brought in or just the time it takes for the depot to spawn a convoy?
Will CV's receive convoys at all?
How many ships and trucks per convoy?
Will ship convoys use evasive action when being attacked?
(This one is a hope to see rail yards implemented)In the map you used as an example, rail yards wouldn't be too effective in distribution of supplies, but on other maps, Trinity as an example, rail yards could be an effective way to distribute supplies (though you could probably use one on the main island on the map used in your example).
I didn't want to ask those questions, but they are just a few things that would need to be addressed (some really simple, others, not so much).
However, I really like where you are going with it.