Exactly! It would be awesome if the suggestions where taken from our own controlled vocabulary syntax system. If that's not the case, it's so much better to not see any suggestions because they confuse you!

E.g.: If I tag all things related to Graphic Design with a tag called: "graphicDesign", why would raindrop suggest I tag a new similar link as "Graphic Design", or "Visual Design", or "Design", or even worst "UX", etc. That only adds confusion and noise in our controlled vocabulary tagging system.

I have to agree with this. I've got a certain setup in my tags, and those global tag suggestions just create extra clicks for me. I wish they'd be 'on the side' that you could still see them but not interact with. I'd much prefer to just quick-click my own tags instead.