The point is to create a base battle which is more challenging for the attacker. It's similar but much more difficult for the attacker to complete, hence the extra reward at the end. There's also the consequence for failure, in that the opposing legion is able to lock your base in retaliation.

Because they can only repair once this makes attacking way easier.

Not necessarily. To me, the disadvantage of not seeing how much health remains is a big demotivator, and after a long time of clicking, not knowing if the opposing legion repaired or not, it can come to the point where someone may give up when the base is on the brink of destruction.

Perhaps two repairs makes more sense, I'll revise the original post. But there should be some sort of positive difference to Ghost Locking for the attackers differing from normal base locks, otherwise there'd be no incentive. Other than the added rewards of course.

Just saying any of the top battle groups would be able to take down any base. and i mean ANY.

Then make the ghost lock unsharable to battle pacts?

What if you crit hack the leader or officer of a legion, and gain base location instead of
a planet location.

Isn't that what you're hacking anyway .... enemy intelligence ...

That doesn't mean a guaranteed lock should be made available. At least this way you get the chance that they can't find you. And no, disregarding CRA's recent lock, WDE hasn't been locked in months.