What would be really helpful is making the register display like Quicken 2007 in which each register had alternating shaded rows in different colors. The colored lines made it easier to read and to tell which register you were in. In the current Quicken Mac, all registers have the very faint gray alternating rows, which takes away the visual cue of what register you're in.
I also liked that when you were finished updating the transaction you hit the return key and it goes to the next transaction line. And I liked the way Quicken 2007 handled the reconciliation process. It showed you which transactions matched and it was easier to understand for us non-accountant types.
Mod Edit: Please only vote here for the option to have the 'option for colored rows of account registers'.The second request has been split off for easier voting here: Stay in Edit Mode or to Hit Return/Enter To Open New Transaction
