Spell points have two options: 

• you get a point and you can spend it, which for me results in hoarding as I may want a leg spell for when leg spells are my only option. As a Trainee, I probably want the very useful shock collar spell, but maybe not until I'm in a situation to use it. In my earlier runs, this option resulted in my always picking the same useful spells.
• you get a random spell, which is sometimes a lot of fun as I get a spell I'd never considered before, but also often gives me a arm spell when I can only use leg spells, or gives me something even less useful like Magical Sight. On one run I got three useless spells in a row and then failed the run.

Both of these are fine options, but a middle ground is getting a small number of completely random options, and having to immediately pick one, as in games like Vampire Survivors, or like perk points between levels. This allows further variation like rerolls, or tying rerolls to WP (to dare argue with the Goddess's options), or getting the options as physical cards that you can collect and then use only a limited number of, later, to get the spell.

Although roguelike games rarely present it this way, this is playing-card randomness and there are lots of games that show off different ways to take it, but even a very simple version of this feature would shake up runs a lot while being less of a challenge setting than full randomness.