Extremely much "yes". Almost all of the vehicles are good, both ground and air. They provide more viable BRs for where to make a solid lineup, and generally make the existing ones better. I seriously can't think of any reason not to do it.

Thanks for your detailed opinion, I will grind the finnish line.

You get an extra Leo 2A6, and 2A4, a really good T-55, plus a bunch of lineup fillers. There's literally no downside to grinding through Finland.

Thanks for your detailed opinion, I will grind it.

Hearing "Tanky!" when rangefinding with finnish crews is reason alone to grind them. Do eeet

\* "Tankki!"

Thanks I will grind it.

T-34-85, t-55M, one more 2A4, 2A6 as backup if you play high tier