All 9 powers are good, I just happened to want more blasts or controls, tactics or sorcery, etc, moreso. None of them are wastes of time, they just aren’t so game changing that I can’t be flexible.
Neurotoxic Breath is nice to fit in but again I have other priorities. Paralytic Poison I would take if/when I didn’t already have another S/T hold proc bombed like Dominate. The 3 ally targeted powers I sometimes use as heal/res mules, but there’s nothing wrong with them outside of the fact that I don’t want to spend time targeting allies personally (same thought process as o2 boost - good power, not a personal priority).
As for “who wants” a powerset that gives you broader freedom of power selection, clearly it’s already been established that I do as do others.
I will also add, in case you question me calling powers I don’t take “good”, that my Colds and Thermal have no Shields, and my Pain has no ally heals. I think my Empathy is my only character that actually took an ally targeted mez protection power, and that toon is overdue for a revamp. It’s just my style; minimizing absolute necessities in a powerset makes all your other choices easier. One of my Storms even skipped Hurricane.