Crit Adlos allow you to completly bypass some mechanics and are also unreliable. The RNG of crit Adlos has even more impact on the fight than AST cards.
The only difference is that AST's cards include some kind of possibility of being "unlucky", whereas the effect of Adlos is always positive and spikes with a crit. You just don't pay attention to it because you always play around the idea that you won't have a crit, and that it's only a bonus when it happens, meaning it always feels rewarding. Getting a Balance or an Arrow doesn't feel that way, it just feels "normal", like it's the intended way of things... so the only real feeling you can have with the cards is when you don't get what you want, leading to disappointment.
But still, the effectiveness of Adloquium is tied to a RNG heavy mechanic too, no matter how it makes you feel. The punishment for being unlucky might not be the same in the two mechanics, but the RNG concept is.
Getting a crit adlo is a "ooh look what I got" mechanic.
