Add USAGE for schema level security like USAGEIN schema

I would like to set to some database users to have INSERT on schema privilege. I have set:

GRANT INSERTIN ON SCHEMA myschema TO GROUP myusergroup;

Now inserts on some tables works just fine, but on some of them I get error:

SQL Error [42501]: The statement failed because the authorization ID does not have the required authorization or privilege to perform the operation. Authorization ID: "USER1". Operation: "USAGE". Object: "MYSCHEMA.MYSEQENCE".. SQLCODE=-551, SQLSTATE=42501, DRIVER=4.33.31

The work around is to search for all of the sequences in schema and apply privilege to them like:

SELECT
  'GRANT USAGE ON SEQUENCE '
  || RTRIM(seqschema)
  || '.'
  || RTRIM(seqname) 
  || ' TO GROUP MYUSERGROUP;' AS command
FROM syscat.sequences
WHERE seqschema = 'MYSCHEMA'

But there are two issues:

1. When ever new sequence is created I will get the same error message. The work-around is to create some job that periodically executes above command and grants privilege on new sequences. This may still fail if job execution frequency is not set aggressively enough.

2. Having GRANT USAGE on particular sequences I get large list of privileges in SYSIBMADM.PRIVILEGES that makes managing sequence privileges pretty opaque.

Idea: Add option to grant privilege similar to INSERTIN, but for GRANT USAGE on all current and future sequences like in schema.

GRANT USAGEIN ON SCHEMA myschema TO GROUP myusergroup;

P.S. Alternate idea would be to just grant USAGE on all sequences on schema if INSERTIN privilege is assigned. But... this may not be desirable for some cases when grants on sequences should be more controlled, so maybe USAGEIN would be more appropriate.