In other news, the spell point system makes the Warlock horribly under-powered. The spell point system allows 9 5th level spell slots a day, where as even with more short rests than normal, a Warlock's going to have at most 8 5th level spells at the same level. It levels off a bit at ninth level, and is almost completely gone at 17th. Nonetheless I recommend moving the increase in number of spell slots for the Warlock to ninth level.
By tweaking Font of Magic slightly, a version of the Dungeon Master's Guide Spell Point variant can be achieved that slides comfortably in place along side spell slot casting systems.
CREATING SPELL SLOTS
[TABLE="class: grid, width: 500, align: left"]
[TR]
[TD]Spell Slot Level[/TD]
[TD]Sorcery Point Cost[/TD]
[TD]Sorcerer Level Required[/TD]
[/TR]
[TR]
[TD]1st[/TD]
[TD]2[/TD]
[TD]1st[/TD]
[/TR]
[TR]
[TD]2nd[/TD]
[TD]3[/TD]
[TD]3rd[/TD]
[/TR]
[TR]
[TD]3rd[/TD]
[TD]5[/TD]
[TD]5th[/TD]
[/TR]
[TR]
[TD]4th[/TD]
[TD]6[/TD]
[TD]7th[/TD]
[/TR]
[TR]
[TD]5th[/TD]
[TD]7[/TD]
[TD]9th[/TD]
[/TR]
[/TABLE]
Converting a Spell Slot to Sorcery Points. As a bonus action on your turn, you can expend one spell slot and gain a number of sorcery points equal to the slot's sorcery point cost.
By tweaking Font of Magic slightly, a version of the Dungeon Master's Guide Spell Point variant can be achieved that slides comfortably in place along side spell slot casting systems.
CREATING SPELL SLOTS
[TABLE="class: grid, width: 500, align: left"]
[TR]
[TD]Spell Slot Level[/TD]
[TD]Sorcery Point Cost[/TD]
[TD]Sorcerer Level Required[/TD]
[/TR]
[TR]
[TD]1st[/TD]
[TD]2[/TD]
[TD]1st[/TD]
[/TR]
[TR]
[TD]2nd[/TD]
[TD]3[/TD]
[TD]3rd[/TD]
[/TR]
[TR]
[TD]3rd[/TD]
[TD]5[/TD]
[TD]5th[/TD]
[/TR]
[TR]
[TD]4th[/TD]
[TD]6[/TD]
[TD]7th[/TD]
[/TR]
[TR]
[TD]5th[/TD]
[TD]7[/TD]
[TD]9th[/TD]
[/TR]
[/TABLE]
Converting a Spell Slot to Sorcery Points. As a bonus action on your turn, you can expend one spell slot and gain a number of sorcery points equal to the slot's sorcery point cost.
