Request for Improved Paste Functionality in Clay

Would be great to have a useable paste functionality in Clay. An example - when I import a list of people, there are leads I would like to remove or ignore for now, so I use a text column and write "ignore" in any applicable rows then filter out and come back later. But in Clay, this pasting is just really painful. it's slow, doesn't actually work all of the time, and doesn't let me paste across multiple cells like in Excel, Airtable, Sheets, etc. It used to be a case where I couldn't paste over more than 10-20 cells, but as of today it only works individually. it's really cumbersome, but it's been like this for over a year now, so I'm wondering if it's a feature not a bug..