There's no issue with having 2 GC applications in the system, one is DV based, the other is employment based. He's got nothing to worry about.
With your very low CN, you will most likely get yours before the employment based one comes through. My suggestion would be to proceed with the DV one (with him as your derivative). Once you guys have your DV based GC, you can withdraw the company sponsored application from the system. The good thing with the DV based application coming through first is that your husband is free to leave his current employer (if he chooses to) right away. For the employment based GC, if the employee is not happy with the current employer, he is ethically required to stay with the employer for about 3 - 6 months following the receipt of his GC. If your husband does not work for your employer at all, or only work for a short period of time, this could cause USCIS to question whether he actually intended to work for the employer.
Normally this question will not come up until the employee applies for citizenship. USCIS can look to see if you worked for the employer in order to determine whether you committed fraud in your green card application. however, as long as you worked for the employer for some period and can give a reasonable explanation for leaving the position, the fact that you did not stay with the employer long should not be a bar to receiving citizenship.
Of course this question isn'tlikely to come up until he applies for citizenship. USCIS may check to see if the employee worked for the employer in order to determine whether fraud was committed during the your green card application process. But as long as an employee worked for the employer for some period and can give a reasonable explanation for leaving the position, the fact that he/she did not stay with the employer for a long periond should not be a bar to receiving citizenship.
Now, it may seem like I digressed a bit
, I just wanted to paint a clearer picture of how you could convince your husband about the necessity of proceeding with this application with him as your derivative.