Lyman,
The THS existing limits need no further limiting, and ought not to be limited any further, since there are imaginable scenarios which could warrant full travel. The rudder, on the other hand, had better be limited, lest air loads exceed structural limitations. Not comparable.
...and when the THS moves, it's not only it's little pointer on the scale that provides indication of it's travel.... there are big white stripes on the large black wheels inboard of each pilot, on the side of the pedestal. When the THS is moving, even peripheral vision will normally draw ones attention to those contrasting white stripes moving by.... Maybe the "whooler" shouldn't have been eliminated, but I'm not at all sure that would have made any difference here.