Honestly, I'm surprised that I didn't put it in F tier as well. But it's not a strictly horrible class. I mean... I've had no actual builds that ever even really considered using it. But I'm not actively off put by the class. There's no real harsh feelings towards it. The most object of feelings. And I do honestly see the interesting idea of the Wilder. I liked playing them in 3.5 days, when psionics were allowed... which was even more uncommon than even Spheres are today. Internet is very good at scaring DMs into never letting things be tried out at their table.

And, yeah, agree with your assessments. I will throw out that Being a Destruction sphere specialist, to the exclusion of other spheres is such incredibly boring design. Like it's nice to have Destruction sphere. Even a few talents in it. But being a half caster for literally everything else (not to mention having no modern "you get full talents" archetype) is just so harsh. Maybe if you were literally playing Pokemon, then being Destruction specialized wouldn't feel too bad.