I was reading some old threads about issues with the current curio system because it promotes people advancing while offline.
My suggestion is to allow curios to be immediatly consumed for a very small LP gain, as well as leaving the current system in place for normal study time and large gains.
Choosing to consume them immediatly for " learning inspiration" would add mental fatigue to a bar much as consuming food increase the FEP bar and hunger bar.
When it's full, nothing more can be consumed until time passes while online. (Various activities might reduce it as well, but they wouldn't want to go back to doing mindless things for this purpose, so I think time is a better solution.)
This would give active players an increase to lp earnings and offline players an incentive to play the game more.
While hopefully being a tad more complex for bots, but we all know that botters are gonna bot.