Enhancement: Turned a (ɐ) should be distinct from turned alpha (ɒ)

[NDPtype]

In Charis italic fonts, turned a is similar to the turned alpha, but this would cause the confusion between the two letters:


It would be better if the oblique form is the default, so that it could be distinguish better:

[jvgaultney]

This is consistent with what we do with the non-turned Latin 'a' (U+0065) and 'alpha' (U+0251):

In the italic the 'a' and 'alpha' share the same form. Yes that can be confusing, however in this style the expected form of 'a' has a single bowl.

If a clear distinction between the two is needed then you can either avoid using italic, or turn on the Slant italic specials (ss05) stylistic set as you have done above. See Charis SIL Font Features.

[NDPtype]

Thanks.