I've found it takes about an hour on the bus to be dropped off at your resort from MCO, on average. If you're one of the first stops (which I swear is always All Stars or Pop) then you're off earlier. Last stops, maybe a bit later. Usually I am on a bus within 15-20 minutes of getting to the Mears area, but sometimes you can sit on a bus for 15-30 minutes waiting for it to fill up.
So optimistically, my fastest travel time to WDW is about 75 minutes via Mears. Average, probably closer to 90 minutes. Bad timing, two hours.
With a ride share, figure about 15 minutes to order and get picked up, and then a 30 minute drive. So all in all maybe 45 minutes.
If I am headed to the parks I will do ride share, as it will save a lot of time. But if it's arrival day and I don't have any park time planned or ADRs to get to, I will tend to do Mears to WDW. There's something nostalgic about the pick up spot and bus ride!
I always take a rideshare back to the airport so I am in control of how early I get to the airport (about an hour before boarding, thanks to precheck and skycaps).