Afaik the issue with our filtering system is that we are missing a condenser prior to the filters. The filters do not absorb the fumes, only physical particles (dust). The fumes being what causes the smells. While the existing filter would make the air seem cleaner as the smoke particles are filtered out, it does not stop the vaporized compounds.
If we were to install a condenser (a humidifier system appears to be sufficient according to my research) then the vaporized particles would turn solid again and either be trapped in the humidifier mesh or get filtered out by the particulate filters.
The above is based on my research of blogs and other laser cutting forums.
I also agree that you can never have too much airflow, the less time the fumes spend near the optics the less condensation build up we will have on them.