So here's my problem with the minis as someone who's played the computer game: there is no model using the basic rifle (the assault uses a shotgun and the support uses a pistol), and the heavy sports the one-shot TOW launcher instead of their signature LMG.
Suggestions for improvement that I would offer are the following. Screenshots are provided for in-game reference.
1) Put the heavy into an LMG firing stance from the games, and obviously firing an LMG instead of their launcher - I feel that's more characterful and a better representation of how they're played in the computer game.
2) Put the support soldier into a stance representing either talking on a communicator, carrying a medkit, or using a proximity scanner or some such "supportive" action, or, alternatively, into a rifle firing pose (again, obviously changing their weapon to a rifle) from the games.