Looking at Chris_Nightwing excellent list, I can imagine some of these spells might have their ST changed:
Cause Fear - Wis - You frighten them
I am still not sure about
Fear spells... in one way a "powerful personality" (Cha) seems just what you need to avoid being frightened, but in another way perception (Wis) might help understanding that the threat is not real.
Chain Lightning - Dex - They avoid magical lightning
This is quite a stretch, but some lightning spells might be redefined as unavoidable by dodging (a little more realistic) so that Dex is replaced by Con ST.
Command - Wis - You control them
This definitely sounds like a
compulsion (forcing actions to the victim) rather than a
charm (tricking the victim's perception) so why not Cha ST just like
Dominate?
Disintegrate - Dex - They avoid your death ray
Well this is Dex because it used to be a
ray but in 5e rays are just going to be spells requiring a magical attack. The victim already benefits from Dex to AC (unless armor bla bla...) so why another Dex ST? Why not CON?
Hold - Wis - You paralyse them
This could have definitely been a Str ST to break free, but I understand that the "mind-controlling" nature of this spell is very traditional and so I'd keep it. However, it could still switch to a Cha ST.
Irresistable Dance - Wis - You make them dance, dance magic dance
Another candidate for Cha, IMHO of course.
Phantasmal Force - Wis - They see through your illusion
As already suggested, Int could very well become the default ST against
Illusions.
Polymorph - Wis - They resist transformation
In 3e the main ST was Fortitude, and the Wis ST was for disorientation... I wonder how it got changed this time. I think Con is more appropriate than Wis for the transformation itself, but also Str might work, although it's quite a stretch.
Sanctuary - Wis - You make them think twice about attacking
Could have been Cha. I guess there is now some ambiguity when it comes to willpower.
Thunderwave - Dex - They avoid forceful thunder
Well this is just wrong... can you dodge a thunder? "Forceful" clearly suggests a Str ST here!
Web - Dex - They avoid your webs
Dex and Str need to be featured here to break free, but honestly if Str is going to be allowed only as a check rather than a ST it doesn't really matter.
These changes may shift the balance from 0-16-12-0-13-5 to 3-13-14-1-8-10, not much of a change, but if many Illusions change to Int ST then the balance will be quite a lot improved. Then spells such as
Bigby's xyz-ing hand would definitely have a Str ST.