Yes data seems to show the hit 10 - 15 sec after the "pass behind" instruction.
My original point is it takes generally takes 3 things to cause the accident chain. The first single controller didn't cause it but two controllers might have broke the chain, just like any of the other 3 could have broke it. What if they'd recieved instruction 30 sec earlier?
A pilot can always say "unable" its just you might be asked to make a phone call later to explain. It's always better to still be around to explain. The two CRJ pilots discussed before they accepted.
Even small planes have tech in cockpit showing other traffic its just not going to work for traffic at 200' agl. Also have had for long time tech that shows where you will be in 5, 10 etc minutes. Tower has it too.
The CRJ had been cleared & accepted circle to land 33 and then cleared to land which means cleared all the way to the ground not just 400'.