This is a minor thing. I've been struggling in 1e with a Drow Nightmare Fist character. Mainly: there isn't a good way to use Deeper Darkness (because they lose reg Darkness) in a party that doesn't have built in vision options or truesight.
There are 2 darkness spells and 4 light spells (in core). The only way for light to counter darkness without dipelling or negating it is Heightened Spell metamagic, which can't apply to spell-like abilities so my Drow is SoL and kind of a detriment to her party with her main combat tactic. I believe there's also a Shadow Sorc subtype with a similar issue?
There are likely other subschools and "interactive" spells I think need some more options. Whether they're more flexible, or numerous, it doesn't super matter, but I think it's a niche which could use some expanding on to make "all options viable".