I understand where you are coming from. Logic dictates that parenting time should be shared. Logic often does not apply in family law.

What's already been established is your husband is the non-custodial parent, with limited parenting time. In order to change this, judges barely look at what you have to offer, or why you want more time. Instead, they look at why they should reduce the time of the custodial parent. From there, abuse and neglect are really the only categories they consider. If you can't prove either of these, judges are reluctant to change the parenting order. Getting custodial changes are uncommon, to say the least, because of this criteria. To add, family courts greatly vary from state to state, county to county, and judge to judge. Laws are set up in a "grey" area, so the prevailing attitude of your area comes though. What this means, is the identical set of circumstances can result in completely different results, and both be supported by the law. With that being said, have you spoken to an attorney? In my area, from you described, the chances of a custody change are probably 1/100 at best. It could be very different in your area.