1. Those are some nice rhizomes
2. They look fine to me.
You'll see newer leaf growth in time. You'll see the outer leaves leave first probably before the new growth starts. And then this winter they'll almost all brown out. Next spring is when they'll take off and grown those super tall green fans and the newly cut leave will all be gone. Just water frequently at first. Soon enough in weeks those roots will hold themselves and hold back on the water. Just takes patience and time.
