One should not confuse the strength of Strong on average across the board and the strength of Strong, say, in my hands. The fact that I can take out all sorts of swamps on Jebus Cross with my eyes closed does not mean that on average it will go the same way.
Precisely because of sea navigation, the functionality of Speedy and Nava are similar - in the sea, the number of moves doesn't depend on army speed.
Dungeon needs the lower limit for Troglodytes raised, like it was in the latest TE version - 20-25. Currently it's 15-25, which is quite spread out.
Plus Laura (Scout + Tactics and more Harpies) is debatable and maybe some adjustments in the build tree. For example, Medusas as a dead-end branch.
Also, it wouldn't hurt to give Adgit a shooting skill + some other skill like Ballistics or Defense and more eyes. Although he still won't replace Shakti. IMHO