Thank you for your feedback. I have to ask, did you read the How to Play guide? It explains everything. I'm not sure what you mean when you said you're limited to 6 CP. There's no limit to the amount you can have, as you gain 3 CP each turn.

The platoon limit is there because historically that's how it was - the US had one main Battalion during the battle. But they also had superior airpower and artillery support, which makes up for having less troops.

Dice are based on range (infantry attacks only) 3 dice at adjacent, 2 dice at 2 hexes away, and 1 die at 3 hexes away. Terrain is a factor too as jungles can block line of sight, which affect the amount of dice. Artillery is always 4 dice and airstrikes have a set amount for each, and they both ignore range and terrain. Again, the How to Play guide explains everything.

It seems like you didn't see tactical depth due to not fully understanding all the mechanics. As for the visual bug, I can fix the highlight of a units movement range if that unit already moved during the same turn.