Errm...do we need a MLRS to counter another MLRS? 
Really, what we need is air superiority, effective ground detection
capabilties, and radar to track where the Asters are firing
from.
These are largely fulfilled or under progress. With the F-16s,
NGFs, A4s, AWACS, we should be able to achieve air
superiority.
To hunt MLRS or artys, we can use UAVs (or UCAVs?) and call in the
strikes. If they fire, the ground radars would pick up their
location and call in air strikes....
Question: Do we need a MLRS to complement our Arty?
Dunno....depends on cost and effectivenes.....