"struggles to 'bite' on ice (probably due to the RC)"
Detune your board, if you think so. But i think it is all about the skills.
detuning the board would give it even less of a "bite" so don't do that. it might partially be due to the RC but different RC boards will have good grip. A lot of it depends on the side cut. Magnetraction on lib tech and gnu boards for example grip very well on ice and so do a bunch of other boards I know. Camber may help a bit but that's not the main thing that's wrong