Following the change to the representation of the diphthong /aʊ/ from “ou” to “au”, some additional changes:
“iy” is changed back to “ai”, since many conlangs use this diphthong representation and it is closer to IPA /aɪ/.
I am in two minds as to whether “oy” should be changed to “oi”.
“o” and “i” often occur together when they do not represent a diphthong, such as when the suffix “-ing” is used.
Similar objections apply to changing “ay” to “ei”.
This gives the long vowels and diphthongs represented as ah, oh, au, ay, ai, oi/oy, uu, ee, ir, ayr and uur.