is that good or bad.
Well, every question has an answer.
It is good, if Sejil-2 has Radar guidence and can target large metal targets (such as US Aircraft Carriers) in Indian Ocean with high precision.
It is even better if Sejil-2 will have Optical Guidence and can hit US Air Bases on the ground. Using Spy satellites to get the pictures of the bases first.
It is good that Iran will use Ballistic Missile bases that can house 100 Ballistic Missiles to counter any US Air Attacks (ground and naval) against Iranian assets.
Conventional Ballistic Missile base is a new strategy to counter US Air War strategy.