Sounds like misguided attempts to help the consumer may be what pops the RE bubble.
Another reason for the RE bubble to burst... 0% down interest only financing.
There are a million of these out there. When that one hits, watch out.
Also you can work with RE agents on their commission fees. Have done so many times. Never paid 6%. Ever.
How?
I don't see how increasing competition/lowering transaction fees will burst the bubble.