Kyriel and Sharun could have been asked by another priest somewhere else if they would look over the pilgrams here in Wellspring as there will be many people and no priest is currently assigned to this temple.
Both of those sound good to me.Works for me. We can say Baden has a passing acquaintaince with Kyriel and Sharun. He did a job for the Church of Ioun at some time in the past and Kyriel was his contact there. He needed some information for that job and Kyriel directed him to Sharun, with whom he traded an obscure text he'd picked up on another job for the information he needed. Does that work for you guys?
When he found himself at loose ends he headed for the temple here in hopes he'd find one or the other of them and pick up something to support himself, even if it's not his usual sort of gig.
The library would be the internet, it's clerics would be google, and even google directs you to the place you can go to get the information you're looking forA library in a temple of Ioun, not having much information? I'm seeing the priesthood as being the Google of their day, obsessed with collecting and sharing information

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.