SLE cancellation was predictable. SLE is squeezed in between graduation and R-Day. With all of the other priorities such as 2020 graduation, CST, CBT, etc., it did not seem possible to get a cadre trained and ready to conduct SLE.
One thing is almost certain - CBT will happen, even if it is delayed a little. If it doesn't, we will all have a lot more to worry about than summer training.