Tales and Chronicles
Jewel of the North, formerly know as vincegetorix
Minor nitpick. In the table you show Sorcerous Recovery getting additional uses at level 10 and 20 but in the text describing the ability you state they get additional uses at levels 6 and 18.
The 2nd level feature giving the ability to change the damage type just seems uninspiring. I don't know, I can't really put my finger on it. The other half of it being able to change the save stat seems a bit too much at 2nd level. Even on a short rest use.
Your metamagic seems to leave a lot of the metamagic abilities out that made the Sorcerer stand out from the wizard. Quicken spell, twin spell, careful spell, extended spell, subtle spell. Also doubling down on spell slot usage to fuel metamagic will just make the Sorcerer burn through their spell slots twice as fast and out of breath early relying on cantrips for everything later in the adventuring day. With Sorcery points there was at least a separate (but transferable) pool for the metamagic to draw upon so you could at least cast the same number of spells as the wizard and still use metamagic. There is already a large crowd of players upset at the limited number of spells known and now you are essentially taking away spell slots to cast too. As it stands the wizard is a much better option just on sheer number of spell slots available to cast actual spells.
Hey, tell that to WotC, they're the ones that came with the boring elemental/save swap features

I'll probably just convert the 3.5 metamagic feat, with the ''cast with higher resource'' instead of ''spend more resources'' and remove spell secret.
I think with the 3/day spell slot recoveries, the Sorcerer do get more spell slots/day than wizard, but as said before, I dont do math, so its more a gut feel more than anything else.
Repeat Spell: A repeated spell is automatically cast again at the beginning of your next round of actions. No matter where you are, the secondary spell originates from the same location and affects the same area as the primary spell. If the repeated spell designates a target, the secondary spell retargets the same target if the target is within 30 feet of its original position; otherwise the secondary spell fails to go off. A repeated spell uses up a spell slot three levels higher than the spell’s actual level. Repeat Spell cannot be used on spells with a range of touch.
Maximize Spell:All variable, numeric effects of a spell modified by this feature are maximized. Saving throws and opposed rolls are not affected, nor are spells without random variables. A maximized spell uses up a spell slot three levels higher than the spell’s actual level.
Widen spell: You can alter a burst, emanation, line, or spread shaped spell to increase its area. Any numeric measurements of the spell’s area are doubled. A widened spell uses up a spell slot two levels higher than the spell’s actual level.
Quicken Spell: Casting a quickened spell is a bonus action. You may cast only one quickened spell per round. A spell whose casting time is more than 1 an action cannot be quickened. A quickened spell uses up a spell slot three levels higher than the spell’s actual level. Casting a quickened spell doesn’t provoke an attack of opportunity.
Extend Spell: An extended spell lasts twice as long as normal. A spell with a duration of instantaneous, or permanent is not affected by this feat. An extended spell uses up a spell slot one level higher than the spell’s actual level.
Alchemical SpellWhen employing a spell with the acid, cold, lightning, fire, or thunder type, you can modify the spell to use your chosen type of energy instead. You choose one type of energy: acid, cold, lightning, fire, or thunder. An alchemical spell uses up a spell slot one level higher than the spell’s actual level.
Disguise SpellYou have mastered the art of casting spells unobtrusively, mingling verbal and somatic components into subtle motions so that others rarely catch you in the act of casting a spell. You ignore the Verbal and Somatic component of the spell. Unless the spell visibly emanates from you or observers have some other means of determining its source, they don’t know where the effect came from. A disguised spell uses up a spell slot one level higher than the spell’s actual level.
Heighten Spell Targets of the spell have disadvantage on the first saving throw of this spell. An heightened spell uses up a spell slot two level higher than the spell actual level.