I think that if's can be improved

if <> then
    
else
if <> then
    else
if <> then
    else
end

end

end

So that you can add elseif's and even multiple elseif's in one block!

The Mit Appinventor allows you to do this by opening a popup allowing you to add elseif's and an else to an if block.

I made a project with screenshots of it Here and one of how it could work on scratch.

It's fine asis.
No support.

No support.

if <> then
    
else
end

is fine as is. Altering it would probably wreck the programming language.

No support. The current way provides a good visual cue to beginner programmers of the logical flow of the program.

This is a duplicate…

But support. If you're suggesting something like this:

if <> then
elseif <> then ▲ ▼ :: control celse
elseif <> then ▲ ▼ :: control celse
else
end

The arrows allow you to expand / delete elseifs.