but do you think it's unrealistic, or gamey to require the interpenetration test? I use the interpenetration rule but am very much of the 'let's play to have fun' variety of player?
I think interpentration is a rule where playing strictly as written leads to bad and unrealistic outcomes.
Take a really common situation, two battalions (A and B) in line side by side touching.
AAAABBBB
Most players would happily wheel AAAA off to the left. But technically AAAA's back corner would interpenetrate BBBB and so require a test. Does anyone do this?
Making a test in this sort of situation means there is some magic gap you should leave between A and B (say 12.3456mm if you bases at 40x30 but 10.3475mm if 40x25) so you can wheel. Do we really want players to have to learn this?
From a simulation point of view it also makes no sense since lines should actually be only a few mm deep, there actually isn't any interpenetration.
The same happens with march columns. If you don't have bendy columns, then march columns (particularly large units) generally can't wheel without interpentrating lots of friends around them. Moving in attack column across the table would probably be faster since march columns would often gets stopped by failed interpenetration tests if they make even slight course corrections. This does not seem desirable nor realistic.
My view is that interpenetration and bendy columns is a situation where most people play it intuitively (aka incorrectly) and get the right results. I have yet to have a argument over either.
Cam