SHOW ENGINES output has the following columns:

• Engine
• Support
• Comment
• Transactions
• XA
• Savepoints

First 3 columns are general purpose and useful. Others are related to specific features. Transactions is probably useful but it's a special case. XA and especially Savepoints are not more important than other features, like indexes, compression, fulltext, GIS, etc. Sometimes feature-related columns are even confusing (FEDERATED). I suggest to remove them - otherwise you should choose between be consistent and having a reasonable number of columns.

An important column is also missing: you should indicate which storage engines can be used in CREATE TABLE. PERFORMANCE_SCHEMA and INFORMATION_SCHEMA can't.