Totally agree light and damage spells should be.

Prestidigitation like effects I think are probably actually good to just let every spell caster (or at least wizards and probably sorcerers and warlocks) have. Things that don't do anything critical, just give flavor that they understand how to control the weave. Just like a fighter probably has better control of their body and can do extra flourishes, a spellcaster can do minor flourishes of the weave. Prestidigitation might still be more powerful than what I have in mind even, but the idea is about right. Basically they're able to create sparks, budge things, create a tiny bit of wind, or other very minor effects without expending much energy. Nothing actually useful to do anything except to say they can do things.