Many issues probably don't need the lengthy deliberative processes that stall or delay change. But the problems with the penny have been apparent for years, maybe even decades. There was plenty of time to study the issue, observe how other economies have made similar transitions and figure out how to make it work in an orderly fashion. Instead, we have a change by executive decree, with no apparent planning. Will the mint start making pennies again in the next administration or the next year? It's certainly possible.
In some states, there's legal uncertainty for retailers that operate without pennies. Planning and forwarning likely would have encouraged states to amend laws to provide for penniless retailers. Uniform nationwide rounding could have been an option, interstate commerce and all that.
Some sort of plan for the pennies themselves might be nice, although maybe some sort of plan could have helped pennies circulate more, reducing the need to mint several billion pennies every year.