I wouldn't call these bonuses useless. It's mainly for those who want to focus on something early. Like early production of destroyer III or going for light cruiser III asap. Yes, there is lost opportunity cost, but it's nice option. But yes, most people would pick other foci (industrial) before the techs, but that's choice as well.
Like Canada has option to produce light tank III before ww2 starts, so you can have few light armor/motorized divisions ready to help out in North africa for example.
I think the worst about TFV trees is actually that the research slots are gated behind independence, which in case of Australia is two slots which is imho stupid.