As u know, as a normal player, get level 75 and collect 200K or 300K DZ currency are not easy.
It commonly need to spend 3 weeks or more.
That means, most player can ONLY afford ONE blueprint in 3-4 week.
Or, in another word, if someone buy a WRONG or NOT GOOD blueprint, means his 3-4 work are totally waste.

First week, we missed first wave M1A blueprint. It's ok, we can't anyone, cause no one know what's going on in next week.

However, u can't just replace the blueprint weekly by ur random idea, without left any CLUE or Regular.

For example, at least mention like this:
1. first week: DMA
2. second week: SMG
3. third week: AR
4. then: LMG
5. and then: SHOTGUN
6. and then: blalalala.

Everybody's DZ currency is very precious——even a hacker. They need to spend it in a RIGHT blueprint instead of NOT SATISFY/UNHAPPY, just because they don't know what will come in next week.