Well, I have been testing a few of the moves that Marth might have had increased range on, most likely due to their tipper hitbox sizes receiving an increase or something. Using
Vipermoon
's assumptions, I tested the range on those moves. They were... (using one 1.1.3 3ds and one 1.1.4 3ds):
Dtilt
Fair
Shield Breaker
Ftilt
Nair
Dsmash
Of those, I can say that Dtilt, Fair and Nair have a slight increase in their reach. Though small, it's noticable enough to not be human error. Shield Breaker, I could find no increase at all, and Ftilt was negligible, so I am going to put that down to human error. It's possible that Shield Breaker and Ftilt did get a slight increase, but I just couldn't confirm it. I will post the result of it here when I get round to it... DSMASH RESULT: After testing, it is either a similar result to Ftilt, or no change by my testing.
I have comparisons for all the moves with increases, in image form. However, I would end up with multiple posts in this thread, and will most likely get an infraction for double posts, so I will wait and create a short video/slideshow showing the changes when I get home and post it to this thread.
It is also possible that some of his other moves also got similar increases in reach, but I am taking
Vipermoon
's word for it, and assuming that these were the only moves.
For now, I'll leave you guys with one set of images; Forward Air on 1.1.3, and 1.1.4. Look at Marth's front foot in relation to the stripes on the ground. The 1.1.4 one is further back, hence, more range.