Don't kill me for it, but this is my opinion on the matter:
ORAS is far from a lazy cash in and is a good remake unlike the highly overrated HGSS. GF took common complaints that people had with RSE and improved on them.
One such complaint is the water routes - GF made them better by making encounters there pretty much optional. Unless the RNG hates you, you will randomly encounter maybe 1 or 2 pokemon at the most in any given water route as you pass through and you can still grind on say Pelipper through the usage of DexNav. This is without Repels, mind you.
I'm not sure if it was common, but it would have most definitely been a big complaint - Mauvile City. Looking at the map from the original games, Mauvile was an incredibly plain and uninspired city. GF poured a lot of time into completely rebuilding it from the ground up to become Hoenn's signature city, far more than the few scattered buildings it was before.
There are a lot of other improvements on the games like May/Brendan's prompts to autotravel to towns at certain points before you get Fly, being able to specifically pick out which pokemon to encounter, having free directional movement when not inside buildings and expanded Secret Bases. To simply call them lazy remakes at this point, especially when it is over stuff like having no Battle Frontier, is bogus. BF probably wasn't popular enough in the wider audience for GF to pour what is likely to be a lot of time and money into remaking and it would have probably been subject to the same cheap team selection process that the Maison has if it was included. Copy-pasting Amie and Super Training apps was admittedly a disappointment, but the changes would have merely been cosmetic.