DW and I are snowbirds and winter in a development in Davenport near the Champions Gate area. It is still mostly a short term rental development that is slowly converting over to full time families, retired folks, and a few of us snowbirds. We weren't interested in a 55+ type community so we just looked for a house that met our needs in a well kept community. So far, this is our fourth winter here, we are happy with our choice.
I started our search on Zillow and spent a lot of time on Google Maps satellite and street view getting a sense of the area. After identifying a few likely choices we contacted a local realtor, got her input, and finally booked a visit to look at a short list of properties. Interestingly enough we ended up purchasing the house that was at the top our Zillow/Google Map list.
I can't comment personally about the developments you mentioned. I did meet a resident of Del Webb Orlando where we volunteer and they seemed satisfied there. My sister in law and her husband looked at Solivita a few years ago and liked it but decided to stay down in Fort Myers.
Davenport is an interesting area, the closer to Disney the more short term rental it becomes. The population swells in the winter as us snowbirds arrive and is especially busy during the holidays when the vacationers fill up the rentals. The houses closest to us are all rentals. Today only one is occupied. That said we have met some very nice folks who live in the neighborhood and get together with them occasionally.
Our commute to Disney isn't bad except during the holidays. Which is OK as we gave up going to Disney during the holidays. I popped over to the MK this morning for my "walk enhanced by Disney". It took me a little over an hour to get into the park. I just missed the ferry and had to wait a while for the next one. It was a bit chilly with the wind blowing whitecaps on the Seven Seas Lagoon. But it still beats the snow and ice up north.
Good luck with your search!