d20 in general I'm not a huge fan of, extremely swingy. I like dice pools, or just 2d6 systems, where things follow a more bell-curve distribution
I feel that. Heck, I've even had fun with d100 systems like WFRP, which while still being a very swingy system at least doesn't have quite so much "10% chance to ignore all the modifying statistics on accuracy".
In other news, I've been picking up bits and pieces from Tasha's, and as with everyone else I'm looking for funky little interactions. One thing I'm noticing is the Investment of the Chain Master invocation for Warlocks. So, at the moment, that seems to basically just mean "oh hey, Sprite/Quasit/Pseudodragon poisons with slightly better DCs!"; as it would unfortunately appear that things like the Raven's mimicry and the Octopus' grappling are more contested ability checks than saving throws, and therefore aren't improved by it. Sadface.
Eldritch Adept does open up a lot of stuff though. Misty Visions for Illusionists, Mask of Many Faces for Bards (as if they didn't already get up to enough shenanigans as-is). Heck, there are even some peculiar interactions with the cast-at-will invocations and stuff like Storm Sorcerer. Because the Storm Sorcerer's gust of 10' movement can be activated immediately before or after you "cast a spell of 1st level or higher". Since this specifically refers to the spell level and not the spell
slot level, it should be usable.
Armor of Shadows + Abjurer is thus now an even cheesier method of recharging the arcane ward than casting Alarm as a ritual.
Thief of Five Fates is just a bit broken though... Taking it through Eldritch Adept, if you're not a Warlock, means you have successfully burned a feat on
absolutely nothing. But by RAW, it's still one of the invocations you can pick up through that feat.