[Houserule] Restoring Spell Slots with Re-focus

Hi all,

After reading this thread which really opened my mind to the various holdovers i have from other systems regarding attrition, I wanted to help traditional spell casters avoid that as well, as I find them very unsatisfying to play at low level, so a simple House rule idea

When you re-focus, instead of restoring focus points, you may instead restore 1 spell slot

Its really simple. To balance this, my thoughts would be for every full caster to reduce their number of spell slots at each level by 1; this would also impact the spell repetitore of spont casters. Cleric's Divine Font provides 2 less spell slots.

This means that casters can go into most fights with their best tools available, just like everyone else. I wanted to keep it simple. I also didnt want to penalise higher levels caster by having something like 1 spell level per 10 mins, as then restoring high level spell slots slows everything down further and feels like its punishing high level casters....

Thoughts/opinions?