The Hue bulbs were routing those sensors, but bulbs (especially Hue) are terrible routers. Your setup will be much more stable without any bulbs attached directly to the hub so they don't try and route your other Zigbee devices. The only bulbs that have been identified to not route are Sengled, so they're not a problem to pair with the hub.
If you need inexpensive repeaters for your Zigbee devices, the IKEA Trådfri outlets seem to be working well.
