Here are some suggestions, questions, and such regarding these.....
God of Destruction
You don't have a deity of creation, but you have one of destruction? No patron deity of creativity, inspiration, ingenuity, invention, craftsmanship, forges, or the like? Which of the others would cover such things? Is the god of destruction also the god of chaos, anarchy, betrayal, defilement, vengeance, or something?
God of Pain
Portfolio probably includes torture, interrogation, self-sacrifice perhaps, and...what? Is this also the deity of famine, disease, curses, poisons, weakness, aging, infirmity, infertility, deformity, senility, forgetfulness, confusion, madness, delirium, delusions, nightmares, dread, despair, fear, loss, sorrow, guilt, torment, envy, jealousy, spurned love, toil, domination, tyranny, retribution, or what?
Goddess of Death
Similarly, what in the broad scope of 'death-related things' is this the patron deity of?
God of Undeath
A narrow portfolio, to be sure. Is this also the equivalent of Charon, Hel, Cerberus, or anything else of the sort? Guardian of the underworld, or overlord of the underworld, or eater of dead souls, or the one who guides souls to their afterlife? Is this the guy in charge of who does and does not get to return via Resurrection or the like? Is he in charge of whether or not a soul is reincarnated eventually, or anything like that?
Goddess of Nature
Is this the goddess of the seasons, day and night, the sun and the moon, the stars, the yearly cycles, or whatnot? Is she the goddess of light and darkness? Or just the goddess of elements, plants, animals, fey, and such? Is she the goddess of decay, fungi, aging, natural deaths, natural poisons, or the like? Is she the goddess of agriculture, or is she against the conversion of natural terrain into farmland for harvesting? If she's the patron goddess of fey, does that make her the goddess of trickery, deception, playfulness, riddles, games, or something?
God of Life
Is this the patron of agriculture instead? Is this the patron of plants an animals and all things that live and grow? Is this the one who decides which souls may return to the mortal world via Resurrection, Reincarnation, and such? Is this the guardian of underworld (keeping the dead in and the living out)? Or what? Obviously this would be the god of healing, mercy, birth (? odd that a masculine deity would be patron of midwives, mothers, and such), and probably crusading against death. But would this be a pacifist deity? Would zest for life and general vivaciousness/enthusiasm/etc. be in his portfolio?
God of Work
Is this the deity of creation, craftsmanship, invention, and such? Is this actually the patron god of agriculture, or no?
Goddess of Revelry
Is this supposed to be the goddess of trickery and thievery? What about banditry, outlaws, tomb raiders, and such? Seems like this is probably your pantheon's deity of art, music, celebration, bards, stories, legends, debauchery, wine/ale/etc., and such, but.... Is this also the goddess of remembrance, funerals, and such? Is cooking part of her portfolio?
Goddess of Love
Now is this just the goddess of good love, or other stuff related to it as well? Marriage, birth, family, friendship, oaths, responsibilities? Lust, wild flings, debauchery, passion, zeal, devotion, artistry, creativity, inspiration, hope, or what? Is she the goddess of lost or forlorn love or anything as well?
God of Justice
Is this the god of retribution and revenge as well? Laws? Warfare? Discipline? Honor? Fealty? Truth? Tactics and strategy? Peacekeepers? Zealots? Guardians?
Goddess of Society
What exactly is she the patron of? Cities, roads, travel, business/trade, and rulership/governance I suppose, but anything else? Laws, family, protection, loyalty, wealth, prosperity, accounting, coin minting, jewelry, crafts, traditions, hearth and home, cooking, what? Is this also the goddess of tyranny, or cooperation? Are servitude, slavery, debt/indebtedness, obligations, responsibilities, duties, construction, civilizing wild territories/peoples, enlightenment, or other such things among her portfolio?
God of Time
Think this one you already covered, probably well enough, but is this the god of seasons, the stars and sun and moon, or anything else? God of counting and accounting maybe?
Goddess of Space
I take it she would also be the goddess of mathematics, geometry, order, science, absolute facts, portals, architecture, and such?
God of Rest
Don't know what to ask or suggest for this one, you seemed to cover it already
Goddess of Magic
Is this the deity of mysteries, secrets, history, scholarly pursuits, strangeness, madness, or other things? The pursuit of power? Or anything besides arcane magic or somesuch?
God of Mind
What exactly is this the deity of? Seems like some or many of his potential aspects would already be covered by the rest of the pantheon. Psionics perhaps, if you use them, but that could just as easily be part of the previous deity's portfolio, or that of some other deity.
Looks to me like you basically left out any clear deities of chaos and most of its aspects, strength or athleticism or warfare, archery, martial arts perhaps, competition, sport, games, gambling, knowledge/wisdom, travel, exploration, or the like. Illusions maybe? Change? Deception? Sneaking? Spying? Information? These can probably be folded into your existing portfolio if you just define the scope of each deity more clearly.
I may check Deities & Demigods later to see what concepts/forces/other stuff it mentions as common portfolio elements.