Honestly, while I do feel your pain and kind of understand your frustration, I don't understand why you aren't happy and supporting them. They have found something they can do together. Do you realize how many fathers can't relate to their daughters? And they aren't out doing something they shouldn't be doing to get in trouble. They are active and healthy.
Our 18 year old played club or competitive softball for 7 years. Of course it was a huge time sucker! We gave up birthdays, and some holidays to spend entire days and weekends at the ball-fields. We practiced 3-4 days a week as well plus our daughter was also a pitcher. So that meant pitching practice in addition to the team practices and more lessons during the off season. I do get it!! OK, my husband wasn't coaching, but he was the team score keeper and statistician. But I LOVED every minute and wouldn't have changed a thing. I loved watching how she developed and improved as a player AND a young woman during this time. She learned time management and self-discipline. How to deal with others both on and off the field. How to deal with successes and disappointments. And how to work with others because they have to be a 'team' in that sport.
As far as you not feeling included, ask if there is something you can do. Or look for a need. I was the team bookkeeper for a few years. OK, not a glamourous job, but I was involved. Then I started taking pictures at the games. I actually got quite good, even if I must say so myself. ;) Anyway, the team looked forward to my husband's stats and my pictures after the games.
By my daughter's choice she gave up the club team a couple years ago to focus on academics at school. She still plays for the school team.
But I MISS her playing! I miss watching the girls play at that level. I miss the parents. I miss our coach. I miss watching the games in coats and with blankets in the spring and then the miserable heat. ;) I miss watching the other teams. I miss packing my 'softball bag' with everything from hair-ties to bandaids, to instant ice, to trail mix and extra pencils for my husband.
And for the record, I wasn't an athlete in school. I played basketball a few years and not well at that! So I was even surprised at how much I enjoyed it and now how much I miss it.
So I would say, be careful what you wish for. Forcing your husband or your daughter to make a choice may not end well.