I’m with @dalacor on this. See my post yesterday, with comparative screenshots. The new Summary screen is a huge step backwards for my particular needs, particularly the loss of a separate Cash on Hand section and the at-a-glance Aged Receivables.
Indeed, wanting the old Summary format back is the primary reason I downgraded back to v16.1.12.
Perhaps tinkering with the new Sub-accounts and Totals in the Chart of Accounts provides some way to change the Summary’s organization, but I still can’t figure it out.