We stayed at the Hilton Orlando LBV in Dec. 2019, so pre-covid, and had a rental car but didn't use it much. We took the hotel shuttle bus to a park in the morning (they ran every 30mins) and then used Disney transportation for the rest of the day, including from whatever park we were in to get back to Disney Springs in the evening. We like being able to have dinner or drinks at DS at the end of the day, and our hotel was about a 7min walk from Earl of Sandwich (basically had to go across the street on the footbridge and then to our room). We used a mousesavers discount code which gave us free parking and a discount on the daily resort fee. Ah yes, resort fees. I think it was about $25 a night, so less with our discount, but it included 2 coffees and 2 bottles of water, per person per day, from the hotel lobby-store place. It was fine, they were brewing Starbucks and did a good job of it so we were happy to get the free coffee and water bottles. Overall, we'd definitely do a Disney Springs hotel again. We are Hilton and Marriott rewards members, so sometimes can get a great deal on a room, or even free nights if we have enough points saved up.
I think what you should consider is the comparative costs of the hotel rooms, and whether or not you are committed to a tight time schedule (and if that were the case, I'd rent a car or use Uber; never trust Disney transportation to get you anywhere in a timely manner). Offsite hotel rooms are bigger than Disney rooms, for sure, if that matters to you (it does to us, we like to relax in the room and appreciate the extra space, sometimes even a sofa or chaise lounge, microwave/coffee maker/fridge in room, etc.- and bathrooms where you don't have to wrap yourself around the toilet to be able to close the door!). Even if we don't save a whole ton of money staying offsite (and the DS hotels don't really feel like you are offsite), we always find the transportation options equal to those of the onsite hotels, and we absolutely love having a nicer, bigger, more comfortable room.