How much lower is your CRS? I believe earlier this year the cut-off score dropped as low as 440?
I don't know about the specifics of your wife's employment - with only one year of employment she probably won't qualify for the Provincial Nomination Program, but check with your province as each of them works differently.
Alternatively, is it possible for her to obtain a closed-work permit? For instance, International Experience Canada - Young Professionals is available to citizens of several VWP-countries, and is pretty easy and quick (1-2 months) to obtain. With this closed-work permit, she will be able to claim 50pts. for a Job Offer, as long as her employer is willing to produce a job offer to her in the exact same position (NOC-code) as this closed-work permit for a one-year full-time position, and pay an employer's fee (which I believe is $260?)
If she qualifies for neither, then you're probably out-of-luck, and will have to improve your IELTS score, obtain a higher degree or obtain more work experience to raise your score. It depends a bit on how much lower your CRS is, to determine what the best course of action is here.