I confess I used quite a lof of miles for intra-european awards even though perceived a poor value e.g. 20k miles for CPH-HAJ in Y compared to 50k in J CPH-SFO but still it saved me 500€ as the CPH-HAJ flights are notorious expensive on last minute bookings.
Bottom line is: If you get a decent value by spending miles it doesn't matter if those miles are spend on standard, save, J or Y awards.