1) In akira's barebone outline it was mentioned that hit was supposed to be close to ten times stronger then u6 ssb goku/vegeta. It could be combined with fact that Toei was still going by ss goku being close to bog ssg goku, in opposite to Toyatoro. Either that or Toei just wanted to go with progress of characters getting stronger instead of trying to scale hit in compare to other characters as Toyatoro smartly made vegeta being only able to use 10% of ssb power.
2) Toei just went ape shit to increase Merchandise and hype of show.
also along with ssg being brought back to anime with next episode, it is very possibly that anime will try to follow manga or rather Toyatoro's overseeing plot of future arc. Possible already retcons in DBS:
[*] Goku has never absorbed any close power to ssg in either base or ssj. I don't mean that he hasn't gotten any stronger since that as he definietly did(probably suprassed buu arc ssj goku/vegeta in base by rof)
[*] First Form Freeza being weaker then rof ssj gohan , also ssj gotenks(if he didn't get any weaker in super)
[*] Gotenks keeping getting weaker by flow's of time in super.
[*] Final form freeza could be ssj2 tier or even ssj3 by current standards
[*] Buu arc Ultimate gohan was most likely around current ssj goku
[*] Hit is supposed to be ssb kaioken x2 by u6 arc.
[*] Ssj2 trunks was compared to cell arc ssj2 kid gohan
[*] Toppo is supposed to be ssb kkx2 of current goku
Let me know





