That's the easier approach, I'll give you that.
Sure, we can continue using hidden bonus resources as the default setting, and we can continue balancing with that in mind, but it will always feel wrong that bonus resources are unlocked later than luxuries (it's just so un-thematic), and thus I'll always find myself adjusting the settings. I'm sure there are a few others who would do the same.
It's not a matter of ease, it's a matter of the tech tree's 5-button limit (and no, this is a not a chance to ask me to expand that out). You either stick resources on 'open' spaces in the tech tree (somewhat haphazardly), or you shove more things off the back-end of the techs and into the civilopedia. Not a good situation. Bonus resources are few, but plentiful, and in most cases won't make or break your game if you have/do not have them where you thought you might. Luxuries are a whole different beast in that regard.
The fact that you dislike it is fine that's why the option exists but 'luxuries unlocked via tech' is not a viable default option for the reasons mentioned above. The small amount of 'discovery' offered by the bonus-resource-tech-unlock system is manageable.
So let's leave it at that. If someone wants to rewrite the SQL for luxury resources to have them unlock differently, that's fine, I'm happy to incorporate that change. But default setting balance needs to be built around bonus resource unlocks.
Anyways, back to the Wheel. Technically 'city connection' UAs don't need the Wheel anymore to work (I'll double check this, but I think this is so as of a version or two ago - need to update UA text).
We could move the Well to the Wheel, but that would leave Mining with only a resource reveal and an improvement. Could also get a little crazy and move the Village to the Wheel (as roads and Villages tend to go hand-in-hand), making that +1 Culture from the Village all the stronger as an early-game policy booster.
I personally think it is okay that the Wheel is rarely a 'first pick' first row tech, but that's just me.
G