Q2/3 is probably my most used plugin!
When trying to fix something I usually just add a new instance of Q3 - and than add 1 or 2 filters to fix what I need.
As a result I can end up with a few instances on a track. Sometimes it can make sense to merge them together - either because I want to save a EQ set to use again - or because I'm running out of ProTools insert slots.
Is there a way to do this? You can copy by hand - but with dynamic EQ on Q3 it's not so easy!
If not it would be a great addition, FF has so many filter slots that I can't imagine this being much of a limitation (although obviously the code would need to handle this).