The deck is doing a bunch of things that "shouldn't" be allowed and rewards having a deep knowledge of the rules and cards in Magic
For better or worse, however, this Doctor Who crossover is also rather expensive
This included not only introducing a range of online-only cards to Magic Arena, it also included buffs/nerfs to under- and overperforming cards
To give you an idea of how strict PSA is, lets look at their Pop Report for Trading Card Games (where Pokemon cards belong) 20 years after the release of the first Pokemon card: Out of 122,343 TCG that they received in 2016, they only graded a total of 55,536 a GEM-MT 10
However, since the value of these decks is significantly above MSRP, just having the new cards decrease in price won't be enough, so we'll likely see a big decline from most of the reprints (especially those that aren't top 100 Commander cards) as well