Here are my thoughts on the anchor.
1) Being the anchor makes you the Ultimate medium of sorts, you can see and touch ghosts. You are basically the "Original Medium" right?
i think that while an anchor is half on the other side and half on the living, a medium (or ressurected person) has a slight footing on the other side thus allowing you to see ghosts but not touch them.
2) Did Bonnie just became a PARADOX ANCHOR? i feel like being the anchor did not ressurect her, instead it lifted off her veil, and only her veil, allowing her to interect with the living.
she is half on each side but is still technically a ghost unlike Amara who was (in her last moments) a human anchor. i say this because Tessa needed an immortal being to carry the other side's burden which is why she chose Bonnie because she can't die.
Am i correct? is Bonnie immortal? ( i mean she a ghost so she's just gonna revive like Vaughn in S04) so does that mean she has became a paradox. killing her would not destroy the other side anymore cause she's just gonna come back from the there?
3) Also, why didn't Bonnie remember touching amara when she died in S04? or anybody else for that matter? Rose? Anna? Alaric? Jeremy?
"So how's it like over there "
"Oh, it's not so bad, i like it here. although, i had to touch this creepy statue to cross the other side. actually...it looks a lot like Elena..."