First 1 major concern that must be solved:
- When your golem is on cooldown mechanist is weak being relegated to be a core engineer whith just 2 traitlines cause golem cd is too high. Something that can be done easily to solve this problem is just adding powerfull spells for f1, f2 and f3 toolbelt abilities that sinergyze with your traits choice.
Second add some pet comands like the ones on ranger.
Third but less important add customization for your golem, being able to dye it would be nice. Also i would love to get at least some skins for it by doing some missions, pvp or wvw tracks.
With that being said i love the concept but it needs some work to make it relevant. Signets are well rounded but i think that the damage signet outshines the condition signet and the mace is just ok, being able to evade with 2 skill on mace or adding some barrier it would be nice.