RE:up,
Were you using the Time Capsule as a router/network backup or just for network backup? If as a router/network backup, I'd replace it with a quality router and separate network storage, i.e. Time machine-friendly NAS box. Apple's networking hardware is aging quickly and these days I wouldn't recommend it. The other benefit is that one device has no bearing on the other. Router goes kablooy? Disconnect the NAS box, replace the router, reconnect the NAS box. Done. NAS box goes kablooey? Don't replace the router. Replace the drive and/or the box. Done. Might not be as 100% dead easy to configure as a Time Capsule but, once it's configured it works nicely.
Robert