The combination of guns used for WB is what I like most. The 1911, lever action rifle, and the venerable Winchester model 97 shotgun "stoked" makes WB for me.
Stages with no rifle or no shotgun totally misses it for me, the combination of guns and transitions is what makes it fun. A pistol only stage is just bullseye shooting, and that already exists elsewhere. There are tons of combinations that keep it interesting with 2,3,or4 magazines, exceeding four mags on a stage usually is doing the same sequence again, and again. I like combination rifle pistol sequences.
The allowing 38 rifles is a great addition to WB. At this time I see no need to up the power factor. Knock down targets will cure that. Timers picking up the 38s can and is done all the time. The only firearm I have not been able to time is a suppressed .22. TO you need to get closer regardless which firearm is last to ensure you get the last shot. There is no rule saying "rifle not last" unless there is some type of obstruction (window doorway) that prevents the TO from getting a little closer to the gun, allow rifle last.
Target distance and size always seems to come up in these discussions. This is totally on the range officials and what they have to work with. Remember who your shooters are! Dumping 7 on 3 big targets at close range is "meh" for me, but my wife gets a kick out of it and if you transition to 15 yard smaller targets on the same stage, you have something for everyone. WB doesn't need everything big and close, but there is nothing better for the sport than a grinning shooter coming off the line cuz he/she had fun mag dumping on an easy target.