just getting back into the game after two years, i've got all the expansions since. has Paradox finally put in an "upgrade navy/replace obsolete ships" feature? it is a serious pain in the arse to have to click a million times to queue up/disband obsolete ships.
Upgrade navy is available in one of the DLCs, yes. You have to be in a port and able to afford to upgrade all ships in the fleet that have an upgrade available to use it. It sets all affected ships to 1% strength, and costs the same as if you were buying the ships new in that province. By default it is one of the buttons on the left row that looks like a ship with an up arrow to the right.