How suitable is thae game for playing over a voice internet connection. I currently regularly play Arkham Horror LCG over a voice connection (due to lack of local ftf) and think the L5r roleplaying game should have the same potential but wanted to check with those beta testers on its possibilites for this format.

I ran one over Skype and didn't have any issues. I can't imagine there being any significant issues with it.

I ran the beta over discord. Worked as well as any other game where you trust your players not to lie about their dice.