Yeah pretty much

They could include a score or show how many enemies a character has killed on the Char Sheet.

Or list the Greatest Enemy killed, that was a thing.

The "Toggle Character Panel" tab could include all that and much more information. Its really kinda light on info right now.

Adding more quests for weapons or items of power which award a payoff other than xp is another way to go post 4. But it would still be cool to have a score or monster manual with like spells cast/attackslanded/expertise list that expands to reveal more info about what you've done. I think right now too many magic scrolls are just tossed into the merchant menus or awarded outright early on. Those could be more quest driven. Tighter on the magic till after the lvl4 cap would be fun.

I agree it feels like lvl 2-4 is pretty over quickly. They could push it out a bit from 3 to 4 I think. The Goblin Camp/Druid Grove battles are pretty high on xp. Hopelly lvl 5-9 is more spread out after the jump to lvl5 boosts.