S!
Don't eliminate the Icons, reduce them to
D 1.0 at night.
Disable all dot radar for dayfighters. Allow DAR for all planes.
Enable dot radar for onboard radar equipped Nightfighters so they can see target dots on their map which are within distance 10.0 of them.
Give planes like the Lancaster III radar detection equipment which tells them when a Nightfighter is within distance 5.0 of them.
Build the He 219. (actually easier and more historically representative to build the Ju88G7)
Let the fun begin!