Rain of Arrows

Some questions about RoA and "projectile attack skill" tagged modifiers.

Found out that Yriel's Fostering armor line "Projectile Attack Skills have XX% increased Critical Strike Chance" does not affect RoA in the tooltip or character panel, even PoB does not count it. Switched to Scourge arrow and it gets the crit chance boost in tooltip. Tested with the beastial rhoa version of yriel's fostering. Atleast in PoB it does not work with any version.

This seems very odd because RoA clearly has tag's "projectile" and "attack". Is there some weird interaction that im missing that prevents it from affecting RoA, or is this a bug?

Anyone know if there are more items that have such modifiers that wont affect RoA?

blast rain mines, rain of arrows, and bladefall do not target mobs.
they go straight up, straight down.
bladefall had this removed longer ago when meta was bladefall mines, as a nerf.
it was OP with low investment, so it was fair.
but that was like literally 5 years ago. time to revisit?
im not sure when blast rain and rain of arrows lost the ability to target mobs as mines, with rain of arrow large aoe, it could be intentional.
but currently we have and have HAD toxic rain which is far more used and often far more powerful, and it DOES target mobs as a mine.
id just like confirmation that their inability to target mobs is intentional.

and yes, someone should take a quick look at proj speed scaling, which seems to have little to no effect.