It should respond to 1v/oct in all modes IIRC. The Karplus mode you mention is the one on the parasite firmware isn’t it?
There’s no parasite firmware for the 4ms DLD as far as I know—just a v/oct time tracking mode that enables karplus strong synthesis, but still without pitch shifting the content of the delay buffer
I miss the DLD a lot. There is a alternative firmware that I believe reroutes the delay lines making it easier to control the feedback when inserting filters and fx. It’s a great way to add some character to the feedback.
I too miss DLD. Although I’ve committed myself to the fluid flexibility of d0, I can’t say it wasn’t marvellous to have both dry/wet and send/return controls immediately available on the panel. Saves quite a lot of spaghetti.