|Is it nice, my precious? Is it scrumptiously crunchable?|
In fact I sometimes wonder if we are all playing the rules properly at all. I read somewhere the other day that the new Space Marine Stalkers and Hunters can fire at full ballistic skill against Wave Serpents. I was genuinely surprised, but when I looked up the Skyfire rule (p42), there it was plain as day, "fires using its normal Ballistic Skill when shooting at Flyers, Flying Monstrous Creatures and Skimmers".
Another rule we overlooked for about 6 months in my gaming group is that ruins provide a 4+ cover save but if the ruin is mounted on a base, then the base only gives you 5+. And I don't think I've ever remembered during a game that going to ground in area terrain gives you +2 to your save, not +1. Not that it makes much difference with Nids in synapse which are fearless and can't do it.
Maybe all this 'meta game' stuff boils down to rules interpretation and personal preference. I had a 15 minute argument with one of my opponents at Call To Arms about being able to choose which assaulting unit to overwatch. We even called a TO over who ruled that you can choose. I was gobsmacked.