Broader Comprehension
This more than doubles the spells you gain each level, which is a pretty big boost. Especially at odd levels when you can suddenly know 5 spells at your new highest level rather than just two, and you don't have to balance picking between utility and offense. And it makes casting via rituals extremely easy.
At 20th level, instead of knowing 44 spells you know 101 spells.
It also really boosts Arcane Recovery, doubling the number of spell slots gained at level 2. At level 4, when you should only be regaining 2 you instead likely regain 4.
Also, you don't typically round up in D&D. You almost always round down.
True Grimoire
What level do you get this at? It's pretty potent for a 2nd level bonus on top of greatly boosting Arcane Recovery and spells known.
It really seems like you're afraid of losing your spellbook. There's not a good reason why this potent magical effect just happens either.
This power also doesn't really fit the theme of a generic wizard. It'd work nicely as a Tome Focused wizard school, but doesn't scream out magical generalist to me.
Possible Fix: Rather than just granting bonus spells, I might have a feature where the first spell of a given level added to the spellboost costs 1/2. Or the first spell scribed each wizard level. It's more in line with the other class features.
I'd replace True Grimoire with, oh, adding half your proficiency bonus to Arcane Recovery. Which is still good, but jumps up less quickly.
Scholarly Insights
I like this one. It's potent but not that potent and doesn't increase the spells you can cast per day. You know more spells and are more flexible, but not overly so.
Grimoire Improvement
I like the reduction of casting time of rituals and preparing spells. That really seems like a neat ability a generalist might gain. They're just better at that sort of stuff.
Potent Caster
This seems super good. Especially since it basically gives you an extra 9th level and 8th level spell. This is huge. Especially since you can do it 5-6 times between short rests. There's a good chance you can use this power every other round. If you can alternate cantrips enough, pretty much every spell you cast might be augmented.