Hi!
I only know Newby Bridge as a drive through, couple of pubs. Sorry.
Ulverston is lovely, lots of little independent shops, cafes. Leisure Centre, cinema/theatre, various services. Nice walks. Close to the coastal/beach areas. Various events throughout the year. It's near the zoo, and all larger amenities at Barrow. I would have happily moved to Ulverston, but my husband initially needed quick access to the motorway for his commute.
However, I would second that the A590 in and out can be awful. As someone that used to work in Ulverston, I spent many an hour stuck in traffic, engine off...zero movement. This happened mainly due to the many accidents and during heavy rainfall; causing floods etc.
That said, if you don't need to travel anywhere specific too often, I can't see it being a major issue.
Property is cheaper in Ulverston and Lancaster area, compared to Kendal.
Enjoy researching, and I'd definitely recommend booking a holiday home to get out and about exploring.