Yeah I was enjoying the PzIV with the L70 but I upgraded to the VK3001 and sold it. Should've just kept it. I have the L70 for the VK so its definitely more useable now but the armour is so light that you really need to be careful. I tend to try to snipe a little with it and make occasional forays behind their lines if I see an opening and try to ruin their TD or arty's day.
Can't wait to have a go in the Russian higher tier mediums - they look lethal.