Axes

I'd remove the rock towers in the main attack path, I don't see a reason for them to be there.
I'd avoid having too many plants sticking out into the playing field, you always want things to be super clear.
Cannon spot here: https://i.imgur.com/HeAHCin.jpg
I'd like to see more accenting, strong colors in some of the crystalized areas, otherwise the map does come off a bit dusty and dull. The white metal helps quite a bit, but I think it could be a bit more pronounced and 'pop'. Coloring some trees is a cheap and easy way to do it, if you want.
There's quite a bit of a circle syndrome with the bases going on, you might want to use rocks/debris to show which side the corner bases are supposed to be on. Doesn't necessarily have to be completely blocked off, but rather create a choke favoring a defender.
Some weather might be kinda nice on the map too.
I'd be a bit careful with the large variants of the Jarban minor rocks, players might think they're cliffs to park ovies on.
Maybe use smaller foliage and rocks to border the natural rocks and crystals from the rest of the map.
Otherwise pretty solid, honestly.