Should we update CSF to V15??

CSF updates stopped in August. What's the recommended approach: update to V15 or use the workaround from https://starburst.help/control-web-panel-cwp/control-web-panel-cwp-admin-tutorials/csf-firewall-error-oops-unable-to-download-no-host-option-provided/ to keep v14.24?

I need some opinions, I have multiple servers and I want to go to a secure approach

It's NOT a 'workaround', it's an upgrade path.

The original CSF made by Way to the Web Ltd. is dead.
Hence why you haven't been getting updates.

Not sure where you have been, but that was announced and posted all over the place last year.

Probably your best choice would be to update to Aetherinox's CSF fork, which is now at 15.08. It seems to be actively maintained and supports CWP directly:
https://starburst.help/control-web-panel-cwp/control-web-panel-cwp-admin-tutorials/aetherinox-csf-firewall-update-to-v15-08/

Alternately, the other promising fork for CSF is the Sentinel firewall supported by cPanel and available on GitHub:
https://github.com/sentinelfirewall/sentinel

It's NOT a 'workaround', it's an upgrade path.

The original CSF made by Way to the Web Ltd. is dead.
Hence why you haven't been getting updates.

Not sure where you have been, but that was announced and posted all over the place last year.

I'm more of a coder than a sysadmin. I don't remember seeing those announcements, but no problem. I'm finding the best solution now.

Like overseer mentioned, this seems to be the right approach:
https://starburst.help/control-web-panel-cwp/control-web-panel-cwp-admin-tutorials/aetherinox-csf-firewall-update-to-v15-08/

But that's for v15 → v15.08. To go from v14 to v15, is this the correct tutorial?
https://starburst.help/control-web-panel-cwp/control-web-panel-cwp-admin-tutorials/csf-firewall-gplv3-release-tweaked-for-cwp/

CWP team should have made this upgrade automatic.

CWP doesn't control CSF, never has, never will.

Which is good & bad about CWP, they allow you to choose and customize most of the features (Apache, PHP, ModSecurity, Nginx, MariaDB, etc.)

But we are trying to get them to incorporate this fork into CWP, instead of the dead one.

Then there are also CSF forks, that people have made paid, against the GPL. That some people may choose as well.