It would be great to see an option for full customization of fiscal year. We should be able to define the fiscal start date, start and end of each month, quarter etc. and then have date functions default to fiscal years.
Companies that use fiscal years do all their reporting in fiscal year, calendar year is meaningless and takes away Tableau functionality and ease of use.
10.3 allows us to select a fiscal year start date but some calendars are more complicated. For example my company's calendar starts in May and months are either 5 weeks or 4 weeks. Building custom formulas becomes too **** complicated and some Tableau functionality doesn't work with it. Moreover, building all types of custom variables makes it difficult for business users to do analysis without requiring support.