So ill tell you why pop-up is neseccary for TLAMs at least and i support the decision from the OP even though its unrealistc. If you ever try attacking anything over sea level, the hawk will strike invisible walls on the sides of things. For example the prefab Gammon site, it has invisible walls around it ant TLAM just goes 3-4 meters off the ground on terminal, blowing up on that invi-wall. Incredibly frustrating stuff after not-so long 30m trip from the retrofitted battleship and all the effort it takes to do the photo recon beforehand.

No AGM-109?

TASM uses the same altimeter system as TLAM so it should theoretically be able to maintain altitude above terrain

something something thats not realistic
WHO GAF

@ Heet : shoot me a message if you can

Thank you for the feedback guys. I might update the mod to be more realistic, and then a "wonderweapon" version with pop-up and TERCOM just for fun.

No version of TASM had TERCOM or a terminal pop up maneuver.
One of the reasons the USN shelved TASM was that there was too much risk of doing blind impacts (blue on green) with firing a fire and forget AShM at ~200 miles

to confirm: yeah that's not realistic, TASMs do not follow terrain, nor could they if you tried as they lack a lot of necessary navigation equipment for that to make space for the active radar seeker