14Cool example, but I'd like to add a disclaimer: even if you're playing a deck that requires particular cards to remain in your library, it's generally still better to stick to 60 cards and play card-undrawing effects like Brainstorm, See Beyond, and Scroll Rack
Remember Wormmon's arena
By and large it is dorks you are bouncing and so card draw wildly outdoes learning
Many staples have already had reprints, such as Farewell, but I think the Legendary Lands from Neon Dynasty are strong contenders to start ticking upwards for a while, now that they are no longer Standard legal
So, these two factors are telling you, welp, ok, the effect is not as hard to avert as before, balancing a little, BUT we're talking about a Xyz, and one in a level WATER monsters can make good use of, like Merlanteans do.Bringing this guy to the field is possibly as easy as CeD, so the only problem would be getting the Umi