No, I don't think so. The behaviour you're describing is consistent with the way mine behaves as well.
I had the same issue with it being overly loud when using my phone in hands-free. So I found a setting within my phone to increase the volume when in "phone call" mode, which allowed me to lower the UConnect volume during phone calls.
89 XJ (Ltd): RE 3.5", full leafs, 3/4" coil spacers, RE monotubes, JKS Adj trac, tcase drop, OME steering stab., BFG AT 31x10.5xR15s on 15x8 3.75bs, Borla cat-back
14 WK2 SRT: DiabloSport catch can, Borla S-Type