Please make it possible to disregard some received DHCP options (See T2997#78071 for screenshot of suggestion), for example:
set interfaces ethernet eth0 address dhcp alter-dhcp-default-gateway discard
Adding this capability also improves visibility about operational gateways (e.g: in a "show configuration commands" output ).
Note: since we already have similar syntax for dns received from DHCP:
set system name-servers-dhcp eth0
an alternative syntax could be (with default off)
set system routes-dhcp eth0