Some Delanos can be very clear and articulate (I have them in 2 of my basses for that very reason) dependent on which model you choose. I don’t have them in my P, which are stock Squier’s and growl like crazy, to the point of being rude. It could just be you have the wrong model for your tastes. However, before running off for something else, try running them without the preamp to see if that’s detracting from the sound you’re after (just because the RH had an active circuit, doesn’t necessarily mean you should have one on this bass). I once tried an RH custom shop 5 and it was fabulous, the best thing I’d tried at around that time, both tonally and playability-wise and if I hadn’t left the shop pronto, there would have been a Fender custom shop shaped hole in my bank balance.