There are disconnect points about a foot down the XREAS line from the shocks, you don't have to go all the way to the canister. Only benefit is that if you ever decide to go back to XREAS, you *might* be able to reuse the lines.
As said, you will loose XREAS. XREAS refers to the shocks themselves, so if you replace shocks, you loose it. You can swap coils and keep the XREAS, not that it applies to you if your shocks are leaking.