Can there be a change to adjust these to scale with their character levels instead of charisma? or at least take away the -2 CHA penalty?
It's jarring to still have each of their spell like abilities be a waste. Teiflings and Aasimirs get their racial abilities to scale on character level.
Here's what Sigil City of Doors did:
AIR GENASI
EARTH GENASIThe Summon Gale ability has been modified. An air genasi may call upon their elemental nature three times per day to produce a gust of wind, knocking over foes who fail a Fortitude save (DC 12 + character level; other air genasi must instead save against DC 10). Targets are knocked down for a random duration, with the maximum based off of the genasi's character level to a peak of 9 rounds maximum at level 30.
FIRE GENASIThe Merge with Stone ability has been modified. An earth genasi may call upon their elemental nature once per day to gain DR 5/adamantine, +1 for every level above 5. This effect lasts for 5 rounds + 1 round per character level, or until it has absorbed a total of 10 damage per character level.
WATER GENASIThe Reach to the Blaze ability has been modified. A fire genasi may call upon their elemental nature once per day to radiate flames, damaging everything within 5 feet for 2d4 fire damage per round, +1d4 for every 5 levels above 5. The damage may be reduced by half on a successful Reflex save (DC 12 + character level; other fire genasi must instead save against DC 10). This effect lasts for 5 rounds, +1 for every level above 5.
The Shrouding Fog ability has been modified. A water genasi may call upon their elemental nature once per day to produce a dense fog that follows and conceals them, granting Concealment 20, +1% per character level. Alternatively the fog may be created in a specific area, granting everything inside concealment. Water genasi and water elementals inside gain Concealment 20%, +1% per character level of the user. Allies of the user gain half of this bonus from the fog, and enemies of the user gain a quarter of this bonus. Regardless of which method is used, the fog lasts for a duration of 5 rounds, +1 for every level above 5.