Super fair!
Patternoid specifically was designed to be hard to read (Hence the name haha), but all the dice have a number system that makes sense behind them. There's a lot of them that are references to different number systems used through various cultures & media, so I wouldn't be surprised to see certain people find certain faces confusing. I definitely hear your feedback though, and I think this is one of those things that could drastically change the "feel" of the gameplay directly.
I do think there's a lot of satisfying potential of getting accustomed to the look of different dice and understanding what number you got from a glimpse. Pattern recognition is a really powerful tool we have just as humans, so having numbers tell you directly what the dice may do in the moment, might actually be distracting and less immersive, as soon as you start understanding the corresponding look of the different dice.
Basically, we're not sure yet ourselves and we need more playtesting to really determine to be honest haha. A nice in-between might be that numbers show up for a brief moment as soon as the specific die has stopped rolling, so you can quickly assess the needed info. The die all roll in sequentially, so this makes sense to me. Or maybe only highlighting a specific number when hovering over the die.
Either way, thank you for the kind words!