The rate of development being slow and steady strongly compels me to bring concerns out up front when it comes to fundamental issues. I see a real danger of 'out of line' becoming 'you are about to desert' for infantry as a quick fix to artillery being constantly harassed by lone enemy players or to other problems arising.
With trolls, yikes. So much they can do as someone pointed out already with artillery. As soon as friendly fire is turned on again post-artillery (as it should be) you have an easy #1 way to troll: standing in front of the barrel of your own side's guns. How is that going to be stopped? I don't have an answer but I'm willing to bet it'd be worth some thought to prevent it and if I don't bring it up it seems everyone takes a 'wait and see' approach for everything.
Perhaps give a way for artillery crew to voice command yell at infantry (or other crew) to GTFO the way and then the infantry nearby who are in the path of the barrel or just in the immediate proximity are given a warning on their screen and if they don't move after a couple seconds the gunners are not held liable for the TK. Just an idea.