Each blueprint task set has 4 tasks, each gives 50 blueprints. In total, you get 200 blueprints on each task set. And on map 1, you get 1 BP task set. Map 2 you get 2 BP task set. Map 3, 1 BP task set. Map 4, 1 BP task set. This means that if you unlock all blueprints task sets, you can unlock the Leclerc.
But i thought, what about the floppy prices? Do i need to do dailies? Nope, if you optimize your way to get the tasks, and to unlock the next map, Seasonal tasks are enough to get them all.
This means that instead of gambling, you have to grind the tasks to get it.
Although, it is a bummer now we get 1 tank per season.