The IXEG´s usability is unchanged with the update to 11.30. So it is perfectly safe to upgrade to 11.30, just make sure to not use the "experimental flight model" checkbox.
There will be no "emergency patch" to make it compatible (since there is no emergency ), but we will think about incorporating some of 11.30´s features in a future upgrade, notably the new particle effects. We haven´t decided yet how to deal with the new "experimental flight model" - I have to evaluate it first, but eventually it will probably become the new regular flight model and I want to be ready for that.
Cheers, Jan