a block that is automatically starts to charge empty items in the AE network in the block it is supposed to charge in (energetic infuser, MFSU, arcane reconstructor :3)

You can already build automatic charging systems using the existing automation tools available. AEs Golden Rule is don't add features that can already be accomplished.

Like crafting terminals? (I know this is a relatively useless thing to comment)

Crafting terminals allow you to craft with the items in your network, nothing else provides this feature.

Question. can you make something to see what is already crafting and weather or not needs a specific item (like you did in ae1)?

AE2 doesn't have crafting yet.