Yep, you’re in the “sweet spot” where you have quite a bit of data, but not too large. There will be some filters for you that are still slower than they need to be.
If you really wish to have Gramps developers address these User Interface issues, you will want to start a separate conversation. There are some contributors that specialize in UI, so that would be a different group. And I 100% agree with you… the standard UX is pretty rough. Which is the main reason I created the Data Entry gramplet, and the CSV Import/Export Merge tool. I hate having to make so many clicks in the regular UI!