information_schema support for ANSI SQL Support
According to wikipedia :
"In relational databases, the information schema (information_schema) is an ANSI-standard set of read-only views which provide information about all of the tables, views, columns, and procedures in a database"
I think such a feature would help the support of Vertica by many more tools and it's never a bad thing when you follow the SQL norm. Standard, normalization and interoperability matter. Especially when your competition has it (these last years, it has been implemented in Hive or Monet DB as an example)