Since I was one of the people that discovered the effect and submitted it, I should add my two cents worth:
1) tactically, allowing bombers to bomb a target and rebase to another location within their range from the target all in the same turn makes a lot more sense than always returning to the home base. This was frequently done in conflicts in WWII and Korea.
2) Bombers can be a bit worthless in the current engagement rules because of the way Firaxis chose to implement things. The Firaxis guys have it totally screwed up in the priorities sequence because bombing targets all the wrong things. In most cases, we want to bomb the defenders to reduce their hit points prior to an assault. The first priority is reducing defensive improvements (fortress, barracks, walls, etc.) and then taking out defensive units.
I am so sick of getting the (bombing run failed) message that I could just puke. It is not logical to send a wave of 20 or 30 bombers against a pop 15 city and have 3/4's of those bombers fail to hit a target. There are just too many thing that could be hit to come away with a null result. Lets see here, 15 defensless citizens, 7 defensless civilian improvements, 2 military city improvements, 2 defenders, and 2 hunkered down workers --- that gives us 28 potential targets that could get by a bomb and only 2 of those 28 targets have hit points that can sustain damage and not die.
Precision bombing is also worthless (first, it comes so late in the tech tree that you never use it except by curiosity.) Precision bombing targeting the city improvements first, what idiot thought that up. The objective is to kill the military and perhaps the military improvements WITHOUT hitting the civilian improvements.
Precision bombing should target the military units and military improvements first, military units and improvements that are in production should also be fair game to be effected by precision bombing. You should be able to destroy the tank in the factory as one of the hit options with bombing.
Some of this frustration is related to the screwed up implementation of culture flipping and corruption at higher levels with V1.17. If you are in a late game blitz war with modern armor against a culturally adept civilization that only has cavalry, then the ridiculous moves to the sublime. You have to bombard cities into the stoneage in order to bang the population down from up near 15 civilians in order to get it to 6 or under to prevent reversion if you do not want garrison the city with 6 or more tanks after the attack. I had to waste 4 turns killing 11 russian civilians just to capture their last cities in a recent game because I had over 150 armor and mech inf tied up in civilian population control.
I think the bomber group movement thing would give back some value to the bombers that otherwise end up as worthless due to the lack of effectiveness, slow movement, and over vulnerability to fighters (even the worthless, limited range WWII variety).
) So I think it might as well be allowed.
But if you want to play on with v1.17f, you're not allowed. 
