At least as an option, allow fields to be ordered the same as the source query rather than alphabetical. This way they can be put in a logical and consistent order. Obviously, a workaround is to...
SSAS Tabular has a "Table Detail Position" described as "...field ordering that define the default field set when visualizing this table in certain client tools". Surprisingly, Power BI is not such a "client tool". Frankly, quite odd, when you think of how closely related Power BI and SSAS tabular are underneath.
