I've been playing around with some new words, and by extension, new rules. I added a rule to "Mora Loss" (which is really just a sort of catch-all bucket for about 30 other rules) to include long vowels:
V [+long]→[-long]/_______## (i.e. a long vowel becomes short at the end of a word or word segment.)
I also added an early rule which may be somewhat superfluous, as I think this already happened in Gothic, but not in the orthography:
b,d→v,ð/V_______V (i.e. intervocalic stops, not including g, become continutant.)
I think g did this in Gothic as well, but I'm imagining something a little more interesting for g as time goes on...
I also added a bunch of new words, which are in the lexicon, mostly for the purpose of examples in the rules:
dōr n.st.n. door.
dūn v.t. to do.
fūts n.st.m. foot.
gangan v.i. to go. Also gīn.
gēts n.st.f. goat.
gīn v.i. to go. Short form of gangan.
gum n.w.m. man.
haus n.st.n. house.
hōhs adj. high.
ja itj. yes, yea(h).
kwīns n.st.f. woman.
lōmyna n.st.n. lightning.
man n.w.m. man, person (not gender-specific).
nī itj. no, not.
standan v.i. to stand. Also stēn.
stēn v.i. to stand. Short form of standan.
þȳþs n.st.m. person.
werðan v.i. to become, to turn into.
wilen v.t. to want.
wisan v.i. to be.
I've also decided that syllabic sonorants can just sit there and be syllabic sonorants, icelandic style (e.g. sivn - "seven", unsr - "our").