Mokopas are pretty good until there are foliage in the way, or the enemy starts to deploy smoke grenades.
The Vikhirs are also faster than Mokopas, don’t loft, and have proximity fuse, so they’re better against helicopters too.
The proximity fuse and speed can also be used to destroy jets and drones too.
The Ka-52 itself is a better platform than the Rooivalk, as it can accelerate faster, has a greater top speed, has DIRCM, greater survivability and a better autocannon ( although it’s less flexible than the chin-mounted 20mm on the Rooivalk).
The Rooivalk gets Mistrals instead of Iglas (which are argueably better), but only gets 4, whereas the KA-52 can hold 8 Iglas.
Vikhrs not lofting is a negative, as it’s harder for them to hit roofs, which they need if the tank is even semi-aware.
Smoke will obstruct the mk1 eyeball as well.
Ka-52 has air-to-ground radar, so your Mk.1 eyeballs are not needed. You also have thermals Mk.2.
Vikhirs not lofting is more of a benefit than an issue honestly.
Vikhirs hitting the turret face and bouncing is an issue that can easily be fixed by aiming it yourself.
Apaches having it doesn’t mean anything when the hellfires are worse than mokopas and the rooivalk doesn’t get air-to-ground radar.
Radar can change range and scope, so that you can more likely lock onto an actual tank, especially if you actually direct the radar to the smoked up vehicle.