It doesn't need any of that. What it needs is a good thinning and reconsideration of some of the branching. The lowest branch, for instance, is unappealing because it it far too long and has foliage and branching only at the end. It should be a jin. The branch above it, on the inside of the trunk bend needs to be either removed or made into a thinner jin, as well. The upper right branching near the trop, which should be a lateral branch, has become part of the apex. It blurs the apex of the tree visually. That needs some correction as well.
The remaining tree needs to be "pushed back" with knowledgeable pruning and foliage reduction to induce tighter growth further back towards the trunk. That can take a while. Current thinking on shimpaku and junipers avoids pinching new growth in favor of pruning.
Read up on how that works.
Overall, this tree (like many established bonsai) has been allowed to grow too long. That happens because of reluctance to take action on extension growth. It snowballs--been there, done that.