It shouldn't hurt anything, but it's probably not necessary. Either way you go, you should be alright. Blowouts shouldn't be an issue...yes, they happen, but not as often as you would think. MOST of the time, they're caused by under inflation, over speed, and over load. All of that's preventable.
Upside to moving them back...MAY give you a little better stability in regards to rocking. Downside...MAY give you a little more bounce. Overall, it's probably a draw. Also, that extra less than 2 feet of distance probably won't make much difference to a 60 mph flying piece of rubber.
2015 Chevy Silverado LTZ - HD tow package
2017 Rockwood 2703WS Emerald Edition