(*I used to be one of them. "Why use a weirdly marked up d8, when you can use a regular d8 and a reference sheet" was my way of thinking. And it still holds merit! But ultimately it's just a variation of "new things are bad" thinking, and I'd rather not reflexively hate on that when it's just a matter of familiarity.)
And price. Those custom dice ain't cheap, are hard to get in some places, and you can only use them for one game system.
And when one day the publisher drops the game line, and the dice are no longer produced, even with the books available from eBay it's still an extra hurdle* to pass if you want to get into that game.
(unlike for example OD&D for which the dice are still readily available).
*) (yes, I have the free dice roller app that includes the FFG SW funky dice )
I get that, but the custom dice are still the same number of sides as regular old school D&D dice. So you have a funky 8 sider. You assign the Heart to 1, Star to 2, Horseshoe to 3,
Clover to 4, Blue Moon to 5, and so on with the rest of the Lucky Charms, using a reference card to remind you what rolling a 1 versus a 4 does. Which is not all that different from needing a card to remember what a Clover does versus a Blue Moon (hint: one of them changes the color of your poop if you eat too much).
Point being though, is that it -is- a weird move by FFG/Edge to use the funky dice in the first place, because it's not all that different ultimately from using a regular funky die. And if all dice are funky anyway, I'm not sure it's worth getting -too- worked up about if it means missing out on a genuinely neat game.