Thinking about the whole 20 mile dot dar thing.
I think it changes nothing.
It changes a few things. Not for the standard from A to B base attack stuff, or even the "furballers".
But for the single buff pilot trying to hit a target (strats for example) deep behind enemy lines. On many maps you could skip dars by careful mission planning - while that did not made him totally invisible (thanks to darbar and flashing tonws), it still left any potential interceptor with some kind of guesswork. As a dedicated buff hunter, I did like that.
Now he's in plain sight all of the time. Single glance will always reveal not only where he exactly is, but also where he's going to. He'S just back to brute force & ignorance, instead of being more able to increase his survival chances by planning his route.
Not unrealistic, but I liked the old gameplay aspect more, even though it made "my job" much easier.
Also, the base radars are now overlapping very much. For example, right now you have many airbases in LWO that are within the radar circle of one or even several vehicle bases one sector away. With the new 65ft alt limit, you are basically "on screen" as soon as you take of. I do not like that either.
If anyone had asked me (of course nobody ever does
) I would have lowered the dar alt to maby 100ft, but left the radar range to 12 miles. Maybe I would have had increased the air warning range instead of the radar range "We know something is out there, but it's not on screen yet"