According to Osho, tathata isn’t the same as “just awareness.” Witnessing retains ‘I am’ and ‘you are.’ “Just awareness” leaves only ‘I‑am‑ness,’ still bounded by an outside world. Tathata transcends this, realizing my am‑ness and your you‑ness as one limitless is‑ness—simple, boundless being. Thus 'just awareness' is a transitional link; tathata is total being beyond omission and separation.
Not quite: first you watch (I and you), then you feel only “I am,” and finally, in tathata, everything—me, you, and the world—is one big “is,” simple being.