Elemental Clerics and Race

Elemental Clerics are one of the unique aspects of Dark Sun that I absolutely love. If playing an AD&D Dark Sun game, I highly recommend getting the elemental cleric book, "Earth, Air, Fire, and Water." The book is great, it includes a few cleric kits, paraelemental cleric options, and a detailed description of the elemental clerics and their mindset. Also, it includes a few extra spells.
There is one thing, however, that I am not thrilled with. The "PC by Element and Race Table". I feel the table is not well balanced. Dwarfs, who are normally allowed only 12th level cleric, can be 20th level Earth clerics. While that may make sense in a setting where Dwarfs live underground, I feel it doesn't make as much sense in Dark Sun.
My feeling on the matter is that certain races cannot channel elemental magic as well as others, it's just part of who they are. However, they are in tune with some certain elements that allow them to channel the elemental magic easier, thus allowing more levels.
That is why I drew up my own "PC by Element and Race Table". I feel this table is more balanced than the previous version. The table lists the race, followed by the element, followed by the maximum allowed level.

Aarakocra: Earth 14, Air 18, Fire 16, Water 16
Dwarf: Earth 14, Air 10, Fire 12, Water 12
Elf: Earth 11, Air 17, Fire 17, Water 14
Half-Elf: Earth 14, Air 17, Fire 17, Water 16
Half-Giant: Earth 13, Air 10, Fire 14, Water 11
Halfling: Earth 12, Air 12, Fire 10, Water 14
Mul: Earth 12, Air 8, Fire 10, Water 10
Thri-kreen: Earth 13, Air 13, Fire 10, Water 12

What are your feelings? Am I just being too critical?