A very very big limitation I find in scratch is the fact that clones don't really have idenities and thus will not be able to be followed, pointed at etc.

I simply wanted something like this:

<touching [clone of _ _ _ v] ?>

(distance to [nearest clone of _ _ _ v])

(distance to nearest clone of [ _ _ _ v])

<touching clone of [ _ _ _ v] ?>

(distance to [color [insert color here]v])

because color is often my work around for clone detection.

Oh, and

point in direction ( v)

blocks for clones as well.

the point in direction block already works for clones.

The other blocks would be very nice and convenient for many projects, such as tower defense and dodging games.