In a relatively short amount of time they took away DME, FP+, resort package delivery, and free Magicbands, all while prices increased rapidly for food (and the DDP), resorts, and tickets.
Each one of those items may not have been enough to entice people to stay (and certainly could be argued they’re all fairly new in the lifespan of WDW), but on a macro level all their small decisions came together to break what once could feel like an all inclusive bubble type vacation once you landed at MCO, replacing it with something that was more cobbled together - they would frame this as ‘giving options’ - and more expensive.
They had an intangible reason people insisted on on-site. They debatably broke that or heavily damaged it.