Tip strip on build array should show the index of input when you connect wire/probe - element[i]. The same on index array when index inputs are not wired. It's wery annoying to find element[27] on build/index array.
Not having to count which index I've placed this wire on would be great. Just add it to the tooltip. On the index array it would be awesome to show on the output side what index was wired in or auto-indexed.