Would it be possible to have the resource icon disappear for non-upgradable nodes, or a different icon appear for nodes that are upgradable? It is a real pain in the ass to sift through your entire empire after you have researched an upgrade to something like shards, or crystals or iron mines (this one may be the worst offender because there are so many upgrades to it) and try to find every single one to queue up the upgrade. This only gets worse and worse on larger maps.

If we could have the HUD icon disappear on claimed/un-upgradable nodes, and then reappear for nodes that are able to be upgraded, or have a new and different icon appear for upgradable nodes, that would be a massive help.