improved support Zyxel switch

We're using Observium to collect data from Zyxel switch ( ES3148 ES2024A MES3528 ES2226 ES-2108G GS4012F)
Unfortunately, there is no separation by Model switch / OS / Version OS / s/n /Featureset. All the listed switches are described as "ZyXEL ES Series" (right to talk about "ZyNOS").
At the same time, it would be great to see CPU utilization, sensors monitoring (where possible). 
But I was unable to get a complete dump from any device. Just in case I have attached some mib files. I hope they help.
Thanks

P.S. hmm ... it seems the site https://mibs.observium.org/ already contains these mibs, but are these mibs used?