Pet food seems a tad on the abundand side of things, yes, but ever since crafting was implemented, I've always felt that the vast majority of stuff is only worth crafting according to its Vision Vapor efficiency, hoping for the 500 diamonds or the other occasional useful reward. The only stuff I really found worth crafting thus far, as opposed to Vapor/Disenchanting fodder, were Orc Nests, Vallorian Valors, a couple of Rainbow Unicorns / Cages to replace the old ones, and of course RR spells and portal boosts, as well as temporary unit-boosting buildings. Every other thing is useless to me. Now, I do realize this list of useful stuff may seem long, however the frequency with which any of the aforementioned useful things shows isn't. Most of the time it's useless 2x2/2x1 culture-only stuff, coin and supplies boosters (seriously?), relics (swimming in thousands), pitiful time boosters (make them 8 hour ones and if I weren't swimming in them already due to events I'd maybe craft some, but 6x3 minutes?). The shard into KP boosters is a nice recipe, given how useless shards are once you've maxed them out, pity that it's outrageously rare. I've literally seen it twice ever since crafting was implemented.
TL;DR there's useful stuff in crafting and I'm overall happy my MA is level 5, but the % for useful stuff to show up could really use some love.