We have discussed this in the past, please take it as an AGE-game-wide comment, i.e. a comment that potentially applies to all AGEOD games, current and future.
Wouldn't it be cool if the minesweepers could actually have a use on the map other than cannon fodder? Would't it be interesting if placing elements with the "minesweeper ability" (when implemented) could actually clear a sea region from rival mines? Obviously elements with the "minelayer ability" would place mines after playing a decision or pressing a button from the unit abilities.
Naval mines is a very interesting part of the game, in my opinion it should be more dynamic.