Will the upcoming Arcainist be able to access wizard arcane discoveries?
As of the most recent playtest document, they cannot. It has been noted by the developers that there are other Arcanist Exploits that they have not revealed and that will be added by the time of final publication.
So...???
The fact that they have exploits that can give them bloodlines and school powers, makes me think it's possible to gain discoveries, though probably only ones available from treating your Arcainist level as wizard - x levels.
That seems a fairly reasonable assumption, and one that I'd probably houserule even if it doesn't show up in the final book.
Also, given what the devs have said about the ACG, it sounds like there are going to be feats and ways for other classes to pick up some of the abilities of the new classes, too, so again- wouldn't be surprised to see it work the other way around (especially because, as you note, they already have a limited access to certain Wizard/Sorcerer abilities if they so choose to use exploits to select them.)
true. At the same time though I wish that there abilities were a bit stronger, like a greater exploit that allows them to treat those abilities as half their class level, and then spend arcane points to treat it as full level for a limited time (minutes per level).
Your not wrong Cricket, LazarX is referring to the fact that as we know so far as written, they can't access arcane discoveries. But the rest of us are saying house rules wise it is possible with some delay in access being most likely.