The IMCR was designed for British pilots to be used in British airspace as our rapidly changing weather conditions deemed that the priveleges granted by the rating would be useful and enable PPL's to use their licenses more often and get out of trouble safely if our unpredictable weather caught them out (as it has me).
The weather hasn't changed so PPLs will be less useful without the IMC rating. As everybody else says - get it if you can for safety's sake. Also, have fun practicing instrument approaches on your computer - you never know when such practice may be useful. Several years ago I watched a student with a mere 45 minutes flying experience in a C152 fly a complete ILS in a PA 28 down to a 200' decision height because he had had loads of computer practice. Whatever our brilliant and sensible regulators decide, it is your life, that of your passengers and you need to hold every card to make your flight safer if you can.
P.P.