I also had (and still have) the floppy version. It was fairly standard for intros to have speech by this time so DOTT isn’t that unusual I don’t reckon. Admittedly, there was more than usual here. This sort of thing always made me lust after the CD versions.
It’s curious that they didn’t change anything else like having a rendered intro or the like. Not that it’s a bad thing. Most of the games that did this (I’m thinking particularly of Shadowcaster) have dated worse than the 2d art in the floppy equivalents.
I had Return To Zork on floppy. That actually had full speech throughout the entire game and came on 12 disks if I remember right.