Liberal Democrat Education Spokesperson Aled Roberts also welcomed the review and reiterated the views of other AMs that the current system was complex.
Mr Andrews has previously defended the system that he is now effectively scrapping, telling AMs in September that there were "significant benefits to having ministerial involvement in regulation".
Under the other option, the boundaries would be changed so that they're co-terminous with the Westminster seats, 30 AMs would be elected via the first-past-the-post system in a specific constituency, while another 30 would be elected via the list system.
That nothing changes but if change is a must, a move to 30 seats to match future Westminster seats with two AMs elected in each, both via the first-past-the-post system.