2 - Proxy doesn't do well, if preferredRecordSyntax is not set.
6 - More control the various optimizations with config..
13 - Live status (via search, present).
19 - Character set negotiation.
21 - Character set conversion for SRW queries.
25 - Auto generate Explain indexInfo from cql.properties .. Or generate
26 cql.properties from Explain (to reduce duplicate info).