Why would they?
You (and million others) just proved yet again they don't have to. Hell they don't need to EVER fix the bugs.
You likely will buy the new fallout title prerelease and it will be bug ridden as well.
Companies don't write good software to get karma points. They write software to get paid. If you are willing to pay for bug ridden software why should they take extra time/resources/money to produce better code.
I mean if I told you that I would pay you $10,000 in advance to build an addition on my home and you could do a good job for $5,000 in material and 2 weeks of labor or a half ass job for $2,000 in material and 4 days in labor which would you do?
What if I sweetened the pot by:
a) giving up right to sue for faulty product
b) promise to keep using your services no matter how bad it is.
c) tell you and other people it is routine to accepts bugs in large construction. I mean there are thousands of nails, hundreds of feet of wiring, and all that lumber which needs to be cut exactly right. It is simply impossible to have a bug free wall on the first try.
You would be a fool to take twice as long for less profit under those conditions. Those are the EXACT conditions you are giving game developers. They would be idiots to spend more time, offer beta copies, offer discounted tester copies, etc. You will pay 100% full price on launch day for bug ridden code.
Why should they provide you anything more than what you want at the price you want it?