It seems good to me. The reaction part is a little odd at first glance, but it makes sense to have that synergy between dragon and rider. Dragonlances couldn't be too good; they gave them an edge and a fighting chance against the forces of evil rather than just being able to mow the evil dragons and draconians down.
In general, seeing all the references to Dragonlance (the setting) in Fizban's warms my heart. I'm also noticing a couple references to MtG's Tarkir, which I've often suspected of being slated for a 5e setting, and the multiverse (with talk of its creation, and dragons' echoes). Considering the whole "Monsters of the Multiverse" release next year, it seems likely that we'll see an adventure or setting relating to that.