Student or Learner
"The curved edges would be a bigger deal than they are."
What does bigger deal than they are mean?
The original tiles are square shape with 90 degree corners. The new tiles are curved at the corners.
"The curved edges would be a bigger deal than they are." is describing the new tiles.
I think it is saying that there is a problem with the new tiles as the curved corners are a problem when the tiles are placed side by side and there are gaps because of the curve