Having A Return To Home Campaign, With No EXP Boost Campaign........

Is like a jelly sandwich with no peanut butter..........Peanut butter with no jelly, I get it.......(Lvl boost with no RTH Campaign)

Feel like the two go hand in hand......Aka making the game easier for returnees. This is simply the opinion of one man.......
https://pbs.twimg.com/media/BGJLRHtCYAA2jNN.jpg

I don't think it's that big a deal. leveling up is already very fast even without the campaign. The skillup campaign is active though and this means their weapon skills will better keep up with their actual level.