I don't mind a split stay as long as I plan/ pack accordingly. I pack the first few days worth of clothing etc in one bag and the second stay in a second bag. I travel light so there's not much luggage to lug. As we use clothes they go back into suitcase 1. On "changeover day" it's already packed up and ready for Bell Services. We either go to the pool at either resort, or go to breakfast/ a park and then head to the second resort. I don't think it's such a hassle but it's really up to you based on your plans whether or not 2 days is worth it to enjoy 2 resorts.
It seems like if you remove the first part of the split stay and adding 1 night to the second stay, you're losing a night and I'd factor that in as well.
In addition to what others have pointed out, keep in mind that changes to the FP process have happened recently and split stays now have 2 FP booking windows. You'd be able to book FP for your first 3 days with a 2 night stay, at 60 days out and then a second window would open 60 days before the second part of your split stay. Note- this is not happening for everyone because
MDE has been really glitchy but it is happening for a lot of people and it did happen that way for me. It's not a deal breaker, I would just be aware and plan FP accordingly.