There’s already been some discussion on w00f135's blog about the mix & match options… that is one Platoon chart that consists of different armed force branches, at the extreme end say SS and Heer mixed together but I wanted to explore this a little more.
The BA rules allow it but Orange pointed out that's not how it’s “meant” to work. It's an interesting subject because the scale of Bolt Action is very small... IMO too small for artillery, possibly anything bigger than light mortars. Also Heer and SS actually did fight alongside one another at Arnhem (in fact so did the Kreigmarine!) so you could argue it's historically accurate... depending on how & where you draw the battle line... which brings into question scale.
At 28mm artillery shouldn't even be on the table... possible even in the same room
Some people think that, when you scale in the ranges, that should apply to Flames of War too! but that would be boring. So we allow artillery on the table acknowledging it would really be further back. This is just further exacerbated in Bolt Action with artillery effectively on the front lines!... and for whatever reason a battery of one? Some straggler left behind? No, again it's more a case of the game is more interesting when we allow these units to play. A 2nd Lt would lead 2-3 squads just infantry with maybe some LMG's. Also somewhat boring. Kreigmarine IIRC didn't even have the heavier support options, they were effectively just infantry supported by or in support of, other armed force branches. So getting fussy about what units comprise a “platoon” seems odd to me.
For me the Platoon Org chart in Bolt Action is just a convenience to restrict the unit types and stop people bringing a tank company to an infantry fight when no prior arrangements have been made. In other words, its just a game mechanism that restricts what war gamers bring to the table and generally steer them towards a "take all comers" list that should be "fair" one-for-one, once unit points are considered. It's more to do with a war gaming mechanic than any kind of real life reflection on the table.
It's nice to have a theme (and I tend to do that with all my games anyway) and in most cases that is forced upon the player with theatre lists, but I don't see any issue with a bit of mix & match. Elite troops were sent on elite missions and then relieved by the PBI, rarely did they actually fight shoulder to shoulder. The same applies to Artillery being anywhere near the front lines. If that was the case, something had generally gone horribly wrong. So the whole precept is we allow all these units on the Bolt Action table because it’s interesting, not historically accurate.
So, that’s a wall of text, but what do you guys think?