Well... As someone who is capable of using all weapons I advise that you should consider some points, namely
Gunner
Pros
- gunner weapons can be used in point blank(added that some bullets and coatings now damage higher when range is closer)
- with its new edge attack boowguns can reload faster
- because of the mounting/jumping system more advantageous spots for gunners appear
- you can still farm bullets
- range varies from short to long
Cons
- squishy
- certain monsters can now climb said advantageous spots
- point blank shooting requires high dodging skill
Blademaster
Pros
- 2 new weapons(yay) which are both sort of overpowered(in a way)
- sharpening time can be shortened
- range varies from short to mid
- can tank heavy shots(depends on the armor and weapon really)
- can deal high damage in one hit
Cons
- range varies from short to mid
- sharpening time can be made longer
- prone to monsters power attacks(hip checks, tail whips, and something of the sort)