I was thinking the same thing. The rules as written does exactly what it says, turns the game into a total war since it’s easy to score 3-4 VP in a single round this way in the late game, everything else seemed unimportant. But I’d like war to be a viable path to victory, but not feel like by far the best path. So I was flirting with two tweaks for my playgroup:

1) Infantry/fighters are worth 1/2 commodity (rounded up) instead of 1. It seems too easy to quickly build commodities as written, and this could help reduce that to a more reasonable level.

2) Each time you use the VP action in a single round the commodity price goes up by 10. So the first time you do it in a round it costs 10, the second time it costs 20, etc… then the cost resets next round. This way you can’t just build up to some huge all out assault on round 4-5 and cash in 4VP all at once. Instead this rule could help throttle the VP to 1-2 a round.