I can't imagine a game I'd ever permit phrenic. I doubt I'd permit half-fey, either.
Spell-stitched has be on undead, and it doesn't have an LA modifier at all, so it wuld suggest to me not to be permissable for players. In addition, I'd say the nature of the template itself means the recipricent shouldn't get scaling spell casting - since the spells are imbued upon the creation of the spell-stitched, I'd say the SS should be limited to the spells it is created with or require a spell caster to add more as WIS increases.
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I was looking at the were-wasp, and noticed a few interesting little differences between lycanthropy and Entomanothropy. Bug-weres have only one difference between inflicted and natural, and that's inflicted can't spread their were-ism, but it would seem they cost the same LA.
Entos, compared to traditional lycans:
The good
Entos seem to have the same sized hybrid form as base creature, since they can choose the size of the vermin they shift into.
They can also command as per command undead (but with their bug, obviously) to an extent, have immunity to mind-affecting affects in their entirety, and darkvision instead of low-light vision.
They get their bugs natural attack with associated poison, which can range from good to worthless.
Flying lycans can only fly in their animal forms, but entos gain flying speed in hybrid as well.
Natural or afflicted, either way werebugs don't have to worry about alignment change or rampages at night.
Entos gain the base saves of their bug, which can be a big increase or minimal compared to the lycans Iron Will and +2 fort and reflex.
The bad
Entos get +2 wis much can lycans but also suffer -2int.
Their hybrid forms don't get the same 2 natural claws and bite as a lycan does, merely getting the same attack as the bug, but were-scorpions do get claws as well.
Natural entos only have 5DR/silver, though I suppose their lower LA makes up for that.
Animals can have some pretty gruesome abilities a ento can't get.