Sometimes you want to reply to specific text, you highlight, you quote but you may want to do that multiple times or over multiple pages and at the moment that is basically impossible. It would be nice to be able to multiquote specific text.

Here for it!

How do you expect it would work from a technical level? Hold CTRL down and try to highlight a second (and third, etc.) block of text?

No, do it similar to the way you multiquote full posts. When the "Quote selection" popup comes up have a "plus sign" that quotes that text.

The biggest flaw I'm finding with the "select text" bit of quoting is that, if you have a few posts that you want to quote specific text from spans multiple pages the only way to do it is to multi-quote then to cute the quote down to the specific text (or texts) that you actually wanted to quote which is tedious at best.