The torsion cannon change feels thematically weird - the division between destroyers and breachers was that the former were backline fire support, while the latter were more resilient and in-your-face. Giving the Breachers a 48" weapon just seems odd.
Beyond being a weird combo, it doesn't solve the core issue of the torsion cannon - being a single-shot weapon on a BS4+ model. Now it's a S8 lascannon, but it still doesn't hit reliably.
Galvanic rifles look fun. Now there's actual competition with Rangers, as it should be. Before, Rangers were simply not good at anything in particular, except for being cheap fillers and maybe ablative wounds for the transuranic arquebus.
My main takeaway from this article though is arc weaponry. Their core downside (intended to kill vehicles, but only wounds them on 5+ and doesn't get through armour) was reduced, without making it the instagib OP anti-vehicle weaponry of 7th edition (wounds on 2+, no save, non-superheavies only have 3-4hp). Seems like a good middle ground.