Worked well for me.
As my mountain ash began to decline due to borers and cankers and such
I grew a broomstick thick sucker up behind it and carefully removed
the main tree.
It had the advantage of an entire root system.
Only mistake I made was in not pinching the top a bit to promote
branching lower down. the new tree is perhaps 5" in diameter now and
has no lower branches for the first 8 ft.
Because these trees are so disease prone here I keep a sucker or two
in reserve.
I bet they would coppice very well.
zone 6 CT USA