There is a built in or_other option in Connect for select_one and select_multiple. Also, it can sometimes be helpful to know when a user selects 'other', so having this saved in the Feature Layer is also good.
However, when creating a feature, seeing 'other' in a list is generally useless and requires the end user manually replace it.
I suggest adding a new method for select_one and select_multiple in Feature Reports to give people the option to manually replace 'other' (or similar text) with another field. Along the lines of:
- ${my_question | other:"my_question_other"}
- ${my_question | replace:"other","my_question_other"}