I have found discussion very interesting of late regarding tone, ergonomics and pickups. I think bass tone is like fine wine. If you get used to a certain tonal pallette, it is sometimes hard to immediately appreciate a bass with a somewhat different tone. One cannot cleanse one's pallette of prior bass tone as one can when tasting fine wine. I have been sort of a P-bass tone kind of guy for a long time, and since purchasing first an ABZ, and the two AB1s, I have found my pallette has slowly shifted to more of a jazz tone. I love the parallel settings on both the 3x and 2x AB1. I do also now like the neck solo'd with the original non p-tone pups, but I do find myself tweaking that tone a bit by adding some bass and cutting the highs a bit to make it a little more P-like.
I also put a P-tone in my ABz, and ultimately was going to switch it back before I sold it. I liked the tone, but it was too out of balance with the bridge to get back to that great Dingwall jazz type tone.
I will probably try the FDVs for grins at some point, but I am now in tone heaven with the N-B parallel setting for both basses and the Glock set flat. So much growl and definition, and just phat clear tone.
Point being that I wasn't always comfortable with my Dingwalls as I am now. It took some time to make that ear-migration in tone, with lots of experimentation with string types and settings, and also adapting technique (as has been previously mentioned). In addition, it took some time to figure out my ergonomically ideal hang point. I used to wear my ABs pretty high, but have them slung down a fair bit lower now. I think you really have to play a Dingwall for a while and really experiment until you find that sweetspot in tone (including platform, pickup type and setting, strings), hand technique and bass location.
I have no GAS for any other basses whatsoever, unless of course they are long-scale Dingwalls! But even if I never purchased another Dingwall bass, I would be vastly content with the two I have.