As much as I want them to fix the big things like lack of generics, I hope they fix some of the little things that the compiler doesn't catch but could/should. One that comes to mind is how easy it is to accidentally write:
for foo := range(bar)
Instead of:
for _, foo := range(bar)
When you just want to iterate over the contents of a slice and don't care about the indices. Failing to unpack both the index and the value should be a compile error.
If `bar` is a slice then the short syntax isn't that useful (although it's shorter than the three-clause for loop equivalent).
But if `bar` is a map or a channel, then that short syntax is very handy.
For comparison's sake, you don't see many PHP users complaining about the difference between `foreach($bar as $foo)` and `foreach($bar as $_ => $foo)`.
I'd also be fine with it if they switched the ordering of the tuple so that only unpacking one thing gave you the element instead of the index. My point is mainly that the behavior you get currently with a slice is not what you want 9 times out of 10.