Honestly, I'm very much for class variety. But that also means build variety. And this is something amazon lacks. There was an attempt to partly fix that with the thunder tree that was introduced in Ultimate, since it offers both a caster option and a wdm option. There are still several issues with that, but the core problem wasn't fixed: You as a player are made to play a build in a specific way.
And that imho sucks. There is little variation between the builds of the same flock. Spearzons might use Fire elementals instead of Defensive Harmony, but it's always a trade-off for some stats you might need more. So in the end what works best will be the final build either way.
But what this little variation also means: It's the easiest to balance. So either way amazon is already really balanced and barb and the like just aren't, or amazon really was neglected, which I honestly doubt considering that several builds were buffed last patch. Bowzon's ele damage went up by 53%, Bloodtree was finally fixed, storm is still as strong as always, and javelin got a brand new skill (which I admit isn't balanced yet).
Either way, there have been cries from the community to remove the lockout and rework amazon's devotion system for several years now, but nothing happened because that would definitely require a complete character overhaul. And that often leads to 2 things: 1) Those who liked the present amazon will be mad that there's a complete rework and may or may not leave the mod forever. 2) A lot of work has to be put into in order to make it work out alright. And right now there are higher priorities.