How many part time hour does it take to buy a single expansion pack?
If that's an issue, I think you have bigger problem to think about rather than FFG's business decision.
My next point being, marketing a product to everyone seems logical. But a key aspect of making a business decision is which consumer group to focus on and which to give up. For someone in serious financial crisis or gets passed over thus, I don't think that's going to be my key customer group. I'll be more interested in keeping my key group happy.
I for one am glad a larger card pool is out before Christmas to keep my interest rather than letting it decay. If all their future cycles are as such, then yes I think FFG is playing with the fire ring. If the intention is as per how I speculate, good job.
For now I choose to trust them.