Of course, that aforementioned bad pull rate is also a big facet here
The widespread haste granting is really the attraction here, not the 10-damage ability
In fact, there are too many extremely expensive Charizard cards to name, including Shining Charizard, Crystal Charizard, Rainbow Charizard, Shiny Charizard GX..you get the idea
It just wont do enough to feel worth the mana or the card in most decks
All this is to say, while people with big Reserved List collections will lose some value if the foil loophole is reinstated on the Gaea's Cradles and Gilded Drakes of the world, the impact is likely overblown, as the most expensive cards on the Reserved List are expensive because they are extremely rare and collectible, not because they haven't been reprinted
These are usually going to be drafts, so keep an eye out for them