I think improving the depth and keeping players healthier will lead to a much better season. We'll have a clearer picture of the depth situation after the undrafted free agent signing period. Unfortunately, we won't know how the health issue looks until the season is over. Fingers crossed though.
The biggest change they made was probably the most important and could create the biggest improvement. Better coaching can get better results out of the same players. I'm not saying better coaching can turn a back up into an all pro, but it can be the difference between a player being a solid backup or a weak backup. It can also make your good players even better.