Yup, this radio is almost "commercial radio loud" reproducing P25 trunked stuff, and the conventional stuff is about half as loud no matter what I do.
And it's the same for me in my case, I have dedicated analog scanners, and this scanner was purchased mostly for monitoring two particular P25 trunked systems in my shack, so it won't really matter. Plus it picks up a bit of intermod in UHF, so it won't be doing much conventional work anyway.
I just find it a bit surprising that Whistler would let this happen.
On the positive side not only is the P25 trunked audio loud, like the other GRE designed digital scanners, digital transmissions sound "human", and not "robotic" like some other scanners sound. Funny that a 10-11 year old design still produces the most realistic audio of any digital scanner (newer GRE's / Whistlers have pretty realistic sounding audio also though). Uniden decoders always seemed more robotic sounding to me, especially the 396 / 996 scanners, and to a lesser extent on my X36 scanners. But of course Unidens don't have this audio issue, or the absurd volume knob sensitivity. For what I need it for this unit should serve well though.