I like the option of the new races.
A) I get tired of the elven wizard, dwarf fighter, halfling rogue, gnome summoner, human everything pigeon holes that people slip into because they are the best optimizations for the given race.
B) The synthesist kind of blows the doors open, as we then get all sort of unique creatures wandering town. It is a shame that the overwhelming best optimization for the synthesist is the half-elf.
C) Players and GMs should play the xenophobic nature of NPCs up a little bit. Arianna hides under her custom cloak as she walks around town. She always assumes she is going to be met with dislike or hostility when moving about town unless she reverts back to the mermaid. They're so cute, nobody could harm a mermaid.
D) The diversity of non-standard races also ups the difficulty of identifying your enemy. If you see a gnome in a party of five and an weird looking creature, you know to focus fire on the gnome or the half-elf. It is not so cut and dry with advanced races.
That is why I like the Wayangs. "What's the fuss? It's a burgundy gnome instead of a lilac gnome." Well, not exactly.
E) Judges will need to approve the advanced races and weed out the ones that are 100% cherry picked for just their skills. But, we have 2 people already looking over new characters as it is. Right now, we are doing the reverse a bit in "Are you sure? That option would hamstring you quite a bit, try this instead." advice. And if someone builds a new race, well then they will have to put up a bit of history and fluff into the wiki to give the race a background.
F) Of the latest characters built, 4 humans, 2 dwarfs, 2 half elf (synthesists), 2 tieflings, 1 elf (wizard). This time next year, I predict humans will still dominate.