Times do change. Didn't WOSM mandate that condoms be available at the 2019 World Scout Jamboree? Yes, they did.  

All I can say is keep up the good work. What do you and your scouts want to get out of the program? Awards?  Ranks? Badges? Or is it about learning life skills? Encourage them to pursue Wilderness Survival in addition to Eagle requirements (7 MBs are elective). If your scouts don't like your district Klondike stop going. Find another one. Keep building skills, ranks and awards will come. 

18 Eagle required MBs can be done fully/nearly fully indoor while 4 (cooking, camping, hiking and cycling) have substantial outdoor requirements.  BSA lost me on "scouting is outdoors" when they added Citizenship in Society merit badge. Most of my Eagle Scouts have said Wilderness Survival should be Eagle Required but yet BSA went with another discuss/research/report type badge. In addition, my Troop was the only one to camp outdoors during our recent district's Klondike.  In the past the Patrols camping outdoors would be awarded more points...not this year.  In fact, the Patrols who did cabin camping were able to work on sled decorations (earning trail points) and eat in the dining hall while my patrols cooked their own their own meals outside.  They were happy to campout but clearly the pressure and awards are emphasizing indoor cabin camping. Heck, look at summer camps and the near complete loss of patrol cooking options.  We struggle to find camps that support outdoor patrol cooking. BSA may say outdoors but their program, district and councils are all pushing more activities indoors (and in some cases away from the patrol method).  Their advertising looks great but not aligned with 90% of what BSA has become.

So will there only be one handbook for coed troops?

You must be doing it wrong. 75% of scouting is outing.