Yes do it.
I'm CPL/IMC - I'll get around to the IR at some point, but I learned loads on the course and in UK airspace find the IMC incredibly useful. It's also useful overseas for VFR OTT or in extremis an "emergency" IAP.
No use to an airline pilot but good prep for becoming one. It would have tightened my flying up in a money saving way had I done the IMC before, rather than after the CPL.