If going to start fresh on aligning to availability, I could see basically taking whatever year's 8k output, divide by some number like 4, round down to nearest whole number, and using that as the average relic recipe. Then, make some adjustment for treasure if you want, which obviously doesn't affect either DS or MH, though adjusting for treasure is made complicated by understanding how much treasure transmuters end up getting, which VTD likely shifted massively.
Last two years, AP more available than AI, yet average recipe AI used just about same as AP. DP, MS, EM, AR, EB, OE, etc. all "corrected". When you have very different recipes, the imbalances will still occur, like how +3 Throwing Hammer and Blessed Redoubt Helm take very different MH, but recipes seem to be converging due to sheer volume needed.
I don't have a problem with DS/MH quantities being reasonably in line with availability for a given year, but not clear why the same theory doesn't apply to every TG. Also, claiming limits of 8k bundles on legendary production while ignoring gold constraint seems misleading. Of course, it's not like 3*/4* are in some perfect balancing act to equitably suck out TG every year. 2021 was all about overloading PS on as much as possible.