Welcome to the forums!
The latest two generations of the kit lenses are remarkably good as long as you stop them down a bit. If the kit lenses you have are the AF-S VR II versions, they work well on a D7200 or D7500.
The Tamron's weaknesses will be worse on a D7200 than on the D3300, I am not sure if the lower res. and stronger low-pass filter in the D7500 are enough to make it acceptable.
The D7xxx series are *much* easier to use than the D3300 as the UI is button- rather than menudriven. The D7500 is about equally as demanding as the D3300 when it comes to lens quality, the D7200 much more. The D7200 with good quality lenses *will* produce more crisp results, though.