I do not have much experience with this mod so i may be working with incorrect information, but i have noticed that the illusioner, the vex and the evoker do not seem to be able to do anything and i am not sure as to whether this is because their actions have yet to be added to the mod in a future update or because there is a problem with my minecraft.

I also seem to have a similar problem with the Silverfish's action. Whenever i use it on a block the camera gets stuck and i become unable to move or get out of it unless i morph back into a human.
Is that an error or is it suposed to be that way?

I do not have much experience with this mod so i may be working with incorrect information, but i have noticed that the illusioner, the vex and the evoker do not seem to be able to do anything and i am not sure as to whether this is because their actions have yet to be added to the mod in a future update or because there is a problem with my minecraft.

Yes, I haven't added any actions to vex, evoker or illusioner yet. I might add it, but it's not my priority.

I also seem to have a similar problem with the Silverfish's action. Whenever i use it on a block the camera gets stuck and i become unable to move or get out of it unless i morph back into a human.
Is that an error or is it suposed to be that way?

Yes, it's designed this way. You morph into block to confuse your enemies. Although, you can morph back into silverfish to demorph from block morph.