To be fair, you don't spend 7000 ap just to get that weapon. It is a tier, which means you are rewarded bonus items, for spending AP just like you normally would.
Look at it this way, this tier lasts 30 days until january. So throughout that time you should just spend AP like normal, perhaps buy Marec for a few months, or spend money on low caps. and once you reach enough spending to redeem a tier, you get those items as a bonus. Like if you spend 7000 AP in the next 30 days, you will get an FAL cannon 30 day, mask 30 day, and 100% exp 30 days as a bonus, which I think is more than fair.
Not to mention the fact that the cannon is crazy buffed compared to the weaker vanilla para.
I'm not saying I'm happy with this patch, only saying that there really isn't any need for all the hate on the cannon tier.
All in all, just remember, the FAL cannon isn't there for the sole reason to be bought. It is there to be offered as a reward for spending 7000 ap ingame on other items before the end of the year.