I have an idea for a house rule that I'm planning on using in my next campaign that I wanted to run by you. It combines the Spell Point and the Slow Natural Healing Variant Rules from the DMG and an idea that I had. Like the Spell Points Variant Rule, instead of keeping track of spell slots, spell-casters have a certain amount of spell points that they can spend to cast spells with different levels of spells costing different amounts of points. However instead of gaining a flat amount every certain level up (depending on the class), spellcasters gain a number equal to a Spell Dice + their Casting Modifier. For every class the dice is a d4 except for the Sorcerer, who gets a d6 (I'll explain later.) Full-Casters get a Spell Dice every level, half-casters get one at level 2 and every odd level thereafter, and bonus-class casters get one at 3rd level, 4th level, and every third level thereafter. The first time that a character would gain a Spell Dice, instead of rolling they gain an amount of Spell Points equal to the maximum amount that could be rolled on the Spell Dice plus their spellcasting modifier.
The second part of the rule is where the Slow Natural Healing Variant Rule comes into play. Not only will I be using this base rule, but also using it with my Spell Points. Instead of regaining all of their lost Spell Points on a long rest, you can spend a number of your Magic Dice, roll them add your Spellcasting modifier (multiplied by the number of dice you spent), and you regain that many Spell points. You regain half-your maximum Spell Dice up to your maximum at the beginning of your Long Rest. Everyone has a number of Spell Dice qual to the amount of times they've gained Spell Points.
The reason I gave Sorcerers a higher Spell Dice is because (a) I want Sorcerers to be more useful than they currently are, and (b) I'm conflating Sorcery Points with Spell Points. To conflate Sorcery Points with Spell Points, Metamagic abilities cost an amount of Spell Points double of how many Sorcery Points they would cost.
What do you guys think? I'm all for constructive criticism.